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Aletaha D, Neogi T, Silman AJ, Funovits J, Felson DT, Bingham CO, 3rd et al.: 2010 Rheumatoid arthritis classification criteria: an American College of Rheumatology/European League Against Rheumatism collaborative initiative. Arthritis Rheum 2010; 62: 2569–2581.AletahaDNeogiTSilmanAJFunovitsJFelsonDTBinghamCO3rdet al:2010 Rheumatoid arthritis classification criteria: an American College of Rheumatology/European League Against Rheumatism collaborative initiative.2010;62:2569–2581.10.1002/art.2758420872595Search in Google Scholar
Smolen JS, Landewé R, Bijlsma J, Burmester G, Chatzidionysiou K, Dougados M et al.: EULAR recommendations for the management of rheumatoid arthritis with synthetic and biological disease-modifying antirheumatic drugs: 2016 update. Ann Rheum Dis 2017; 76: 960–977.SmolenJSLandewéRBijlsmaJBurmesterGChatzidionysiouKDougadosMet al:EULAR recommendations for the management of rheumatoid arthritis with synthetic and biological disease-modifying antirheumatic drugs: 2016 update.2017;76:960–977.10.1136/annrheumdis-2016-21071528264816Search in Google Scholar
Yano K, Ikari K, Inoue E, Sakuma Y, Mochizuki T, Koenuma N et al.: Features of patients with rheumatoid arthritis whose debut joint is a foot or ankle joint: A 5,479-case study from the IORRA cohort. PLoS One 2018; 13: e0202427.YanoKIkariKInoueESakumaYMochizukiTKoenumaNet al:Features of patients with rheumatoid arthritis whose debut joint is a foot or ankle joint: A 5,479-case study from the IORRA cohort.2018;13:0202427.10.1371/journal.pone.0202427612682530188930Search in Google Scholar
Otter SJ, Lucas K, Springett K, Moore A, Davies K, Cheek L et al: Foot pain in rheumatoid arthritis prevalence, risk factors and management: an epidemiological study. Clin Rheumatol 2010; 29: 255–271.OtterSJLucasKSpringettKMooreADaviesKCheekLet al:Foot pain in rheumatoid arthritis prevalence, risk factors and management: an epidemiological study.2010;29:255–271.10.1007/s10067-009-1312-y19997766Search in Google Scholar
Grondal L, Tengstrand B, Nordmark B, Wretenberg P, Stark A: The foot: still the most important reason for walking incapacity in rheumatoid arthritis: distribution of symptomatic joints in 1,000 RA patients. Acta Orthop 2008; 79: 257–261.GrondalLTengstrandBNordmarkBWretenbergPStarkA:The foot: still the most important reason for walking incapacity in rheumatoid arthritis: distribution of symptomatic joints in 1,000 RA patients.2008;79:257–261.10.1080/1745367071001506718484253Search in Google Scholar
Wickman AM, Pinzur MS, Kadanoff R, Juknelis D: Health-related quality of life for patients with rheumatoid arthritis foot involvement. Foot Ankle Int 2004; 25: 19–26.WickmanAMPinzurMSKadanoffRJuknelisD:Health-related quality of life for patients with rheumatoid arthritis foot involvement.2004;25:19–26.10.1177/10711007040250010514768960Search in Google Scholar
Jeong HJ, Sohn IW, Kim D, Cho SK, Park SB, Sung IH et al.: Impact of midfoot and Hindfoot involvement on functional disability in Korean patients with rheumatoid arthritis. BMC Musculoskelet Disord 2017; 18: 365.JeongHJSohnIWKimDChoSKParkSBSungIHet al:Impact of midfoot and Hindfoot involvement on functional disability in Korean patients with rheumatoid arthritis.2017;18:365.10.1186/s12891-017-1726-7557162628836966Search in Google Scholar
de Souza S, Williams R, Lempp H: Patient and clinician views on the quality of foot health care for rheumatoid arthritis outpatients: a mixed methods service evaluation. J Foot Ankle Res 2016; 9: 1.de SouzaSWilliamsRLemppH:Patient and clinician views on the quality of foot health care for rheumatoid arthritis outpatients: a mixed methods service evaluation.2016;9:1.10.1186/s13047-015-0133-2470235426740821Search in Google Scholar
Rosário JL: A review of the utilization of baropodometry in postural assessment. J Bodyw Mov Ther 2014; 18: 215–219.RosárioJL:A review of the utilization of baropodometry in postural assessment.2014;18:215–219.10.1016/j.jbmt.2013.05.01624725789Search in Google Scholar
Carroll M, Parmar P, Dalbeth N, Boocock M, Rome K: Gait characteristics associated with the foot and ankle in inflammatory arthritis: a systematic review and meta-analysis. BMC Musculoskelet Disord 2015; 16: 134.CarrollMParmarPDalbethNBoocockMRomeK:Gait characteristics associated with the foot and ankle in inflammatory arthritis: a systematic review and meta-analysis.2015;16:134.10.1186/s12891-015-0596-0445532926044780Search in Google Scholar
Semple R, Turner DE, Helliwell PS, Woodburn J: Regionalised centre of pressure analysis in patients with rheumatoid arthritis. Clin Biomech (Bristol, Avon) 2007; 22: 127–129.SempleRTurnerDEHelliwellPSWoodburnJ:Regionalised centre of pressure analysis in patients with rheumatoid arthritis.2007;22:127–129.10.1016/j.clinbiomech.2006.09.00217052826Search in Google Scholar
Brenton-Rule A, Dalbeth N, Menz HB, Bassett S, Rome K: Foot and ankle characteristics associated with falls in adults with established rheumatoid arthritis: a cross-sectional study. BMC Musculoskelet Disord 2016; 17: 22.Brenton-RuleADalbethNMenzHBBassettSRomeK:Foot and ankle characteristics associated with falls in adults with established rheumatoid arthritis: a cross-sectional study.2016;17:22.10.1186/s12891-016-0888-z471260026762210Search in Google Scholar
Turner DE, Woodburn J, Helliwell PS, Cornwall MW, Emery P: Pes planovalgus in RA: a descriptive and analytical study of foot function determined by gait analysis. Musculoskeletal Care 2003; 1: 21–33.TurnerDEWoodburnJHelliwellPSCornwallMWEmeryP:Pes planovalgus in RA: a descriptive and analytical study of foot function determined by gait analysis.2003;1:21–33.10.1002/msc.3620217661Search in Google Scholar
Stewart S, Carroll M, Brenton-Rule A, Keys M, Bell L, Dalbeth N et al.: Region-specific foot pain and plantar pressure in people with rheumatoid arthritis: A cross-sectional study. Clin Biomech (Bristol, Avon) 2018; 55: 14–17.StewartSCarrollMBrenton-RuleAKeysMBellLDalbethNet al:Region-specific foot pain and plantar pressure in people with rheumatoid arthritis: A cross-sectional study.2018;55:14–17.10.1016/j.clinbiomech.2018.04.00229631228Search in Google Scholar
Colebatch AN, Edwards CJ, Ostergaard M, van der Heijde D, Balint PV, D’Agostino MA et al.: EULAR recommendations for the use of imaging of the joints in the clinical management of rheumatoid arthritis. Ann Rheum Dis 2013; 72: 804–814.ColebatchANEdwardsCJOstergaardMvan der HeijdeDBalintPVD’AgostinoMAet al:EULAR recommendations for the use of imaging of the joints in the clinical management of rheumatoid arthritis.2013;72:804–814.10.1136/annrheumdis-2012-20315823520036Search in Google Scholar
Serban O, Bădărînză M, Fodor D: The relevance of ultrasound examination of the foot and ankle in patients with rheumatoid arthritis – a review of the literature. Med Ultrason 2019; 21: 175–182.SerbanOBădărînzăMFodorD:The relevance of ultrasound examination of the foot and ankle in patients with rheumatoid arthritis – a review of the literature.2019;21:175–182.10.11152/mu-196731063522Search in Google Scholar
Inamo J, Kaneko Y, Sakata K, Takeuchi T: Impact of subclinical synovitis in ankles and feet detected by ultrasonography in patients with rheumatoid arthritis. Int J Rheum Dis 2019; 22: 62–67.InamoJKanekoYSakataKTakeuchiT:Impact of subclinical synovitis in ankles and feet detected by ultrasonography in patients with rheumatoid arthritis.2019;22:62–67.10.1111/1756-185X.1339930338640Search in Google Scholar
Aletaha D, Nell VP, Stamm T, Uffmann M, Pflugbeil S, Machold K et al.: Acute phase reactants add little to composite disease activity indices for rheumatoid arthritis: validation of a clinical activity score. Arthritis Res Ther 2005; 7: R796–806.AletahaDNellVPStammTUffmannMPflugbeilSMacholdKet al:Acute phase reactants add little to composite disease activity indices for rheumatoid arthritis: validation of a clinical activity score.2005;7:R796–806.10.1186/ar1740117503015987481Search in Google Scholar
Fransen J, Welsing P, De Keijzer R, Van Riel P: Disease activity scores using C-reactive protein: CRP may replace ESR in the assessment of RA disease activity [abstract]. Ann Rheum Dis 2004; 62: 151.FransenJWelsingPDe KeijzerRVan RielP:Disease activity scores using C-reactive protein: CRP may replace ESR in the assessment of RA disease activity [abstract].2004;62:151.Search in Google Scholar
Pincus T, Swearingen CJ, Bergman M, Yazici Y: RAPID3 (Routine Assessment of Patient Index Data 3), a rheumatoid arthritis index without formal joint counts for routine care: proposed severity categories compared to disease activity score and clinical disease activity index categories. J Rheumatol 2008; 35: 2136–2147.PincusTSwearingenCJBergmanMYaziciY:RAPID3 (Routine Assessment of Patient Index Data 3), a rheumatoid arthritis index without formal joint counts for routine care: proposed severity categories compared to disease activity score and clinical disease activity index categories.2008;35:2136–2147.10.3899/jrheum.08018218793006Search in Google Scholar
Whalley D, McKenna SP, de Jong Z, van der Heijde D: Quality of life in rheumatoid arthritis. Br J Rheumatol 1997; 36: 884–888.WhalleyDMcKennaSPde JongZvan der HeijdeD:Quality of life in rheumatoid arthritis.1997;36:884–888.10.1093/rheumatology/36.8.8849291858Search in Google Scholar
Wilburn J, McKenna SP, Twiss J, Rouse M, Korkosz M, Jancovic R et al.: Further international adaptation and validation of the Rheumatoid Arthritis Quality of Life (RAQoL) questionnaire. Rheumatol Int 2015; 35: 669–675.WilburnJMcKennaSPTwissJRouseMKorkoszMJancovicRet al:Further international adaptation and validation of the Rheumatoid Arthritis Quality of Life (RAQoL) questionnaire.2015;35:669–675.10.1007/s00296-014-3138-425270915Search in Google Scholar
Wakefield RJ, Balint PV, Szkudlarek M, Filippucci E, Backhaus M, D’Agostino MA et al.: Musculoskeletal ultrasound including definitions for ultrasonographic pathology. J Rheumatol 2005; 32: 2485–2487.WakefieldRJBalintPVSzkudlarekMFilippucciEBackhausMD’AgostinoMAet al:Musculoskeletal ultrasound including definitions for ultrasonographic pathology.2005;32:2485–2487.Search in Google Scholar
Szkudlarek M, Court-Payen M, Jacobsen S, Klarlund M, Thomsen HS, Østergaard M: Interobserver agreement in ultrasonography of the finger and toe joints in rheumatoid arthritis. Arthritis Rheum 2003; 48: 955–962.SzkudlarekMCourt-PayenMJacobsenSKlarlundMThomsenHSØstergaardM:Interobserver agreement in ultrasonography of the finger and toe joints in rheumatoid arthritis.2003;48:955–962.10.1002/art.1087712687537Search in Google Scholar
Mathiessen A, Haugen IK, Slatkowsky-Christensen B, Bøyesen P, Kvien TK, Hammer HB: Ultrasonographic assessment of osteophytes in 127 patients with hand osteoarthritis: exploring reliability and associations with MRI, radiographs and clinical joint findings. Ann Rheum Dis 2013; 72: 51–56.MathiessenAHaugenIKSlatkowsky-ChristensenBBøyesenPKvienTKHammerHB:Ultrasonographic assessment of osteophytes in 127 patients with hand osteoarthritis: exploring reliability and associations with MRI, radiographs and clinical joint findings.2013;72:51–56.10.1136/annrheumdis-2011-20119522523427Search in Google Scholar
D’Agostino MA, Terslev L, Aegerter P, Backhaus M, Balint P, Bruyn GA et al.: Scoring ultrasound synovitis in rheumatoid arthritis: a EULAR-OMERACT ultrasound taskforce-Part 1: definition and development of a standardised, consensus-based scoring system. RMD Open 2017; 3: e000428.D’AgostinoMATerslevLAegerterPBackhausMBalintPBruynGAet al:Scoring ultrasound synovitis in rheumatoid arthritis: a EULAR-OMERACT ultrasound taskforce-Part 1: definition and development of a standardised, consensus-based scoring system.2017;3:000428.10.1136/rmdopen-2016-000428559779928948983Search in Google Scholar
Möller I, Janta I, Backhaus M, Ohrndorf S, Bong DA, Martinoli C et al.: The 2017 EULAR standardised procedures for ultrasound imaging in rheumatology. Ann Rheum Dis 2017; 76: 1974–1979.MöllerIJantaIBackhausMOhrndorfSBongDAMartinoliCet al:The 2017 EULAR standardised procedures for ultrasound imaging in rheumatology.2017;76:1974–1979.10.1136/annrheumdis-2017-21158528814430Search in Google Scholar
Mandl P, Bong D, Balint PV, Hammer HB, Miguel M, Naredo E et al.: Sonographic and anatomic description of the subtalar joint. Ultrasound Med Biol 2018; 44: 119–123.MandlPBongDBalintPVHammerHBMiguelMNaredoEet al:Sonographic and anatomic description of the subtalar joint.2018;44:119–123.10.1016/j.ultrasmedbio.2017.09.01729122317Search in Google Scholar
Naredo E, D’Agostino MA, Wakefield RJ, Moller I, Balint PV, Filippucci E et al.: Reliability of a consensus-based ultrasound score for tenosynovitis in rheumatoid arthritis. Ann Rheum Dis 2013; 72: 1328–1334.NaredoED’AgostinoMAWakefieldRJMollerIBalintPVFilippucciEet al:Reliability of a consensus-based ultrasound score for tenosynovitis in rheumatoid arthritis.2013;72:1328–1334.10.1136/annrheumdis-2012-20209222984169Search in Google Scholar
Balint PV, Terslev L, Aegerter P, Bruyn GAW, Chary-Valckenaere I, Gandjbakhch F et al.: Reliability of a consensus-based ultrasound definition and scoring for enthesitis in spondyloarthritis and psoriatic arthritis: an OMERACT US initiative. Ann Rheum Dis 2018; 77: 1730–1735.BalintPVTerslevLAegerterPBruynGAWChary-ValckenaereIGandjbakhchFet al:Reliability of a consensus-based ultrasound definition and scoring for enthesitis in spondyloarthritis and psoriatic arthritis: an OMERACT US initiative.2018;77:1730–1735.10.1136/annrheumdis-2018-21360930076154Search in Google Scholar
Tuna H, Birtane M, Tastekin N, Kokino S: Pedobarography and its relation to radiologic erosion scores in rheumatoid arthritis. Rheumatol Int 2005; 26: 42–47.TunaHBirtaneMTastekinNKokinoS:Pedobarography and its relation to radiologic erosion scores in rheumatoid arthritis.2005;26:42–47.10.1007/s00296-004-0504-715449023Search in Google Scholar
Elsaman AM, Mostafa ES, Radwan AR: Ankle evaluation in active rheumatoid arthritis by ultrasound: a cross-sectional study. Ultrasound Med Biol 2017; 43: 2806–2813.ElsamanAMMostafaESRadwanAR:Ankle evaluation in active rheumatoid arthritis by ultrasound: a cross-sectional study.2017;43:2806–2813.10.1016/j.ultrasmedbio.2017.08.92828987543Search in Google Scholar
Liu H, Sugamoto K, Itohara T, Tomita T, Hashimoto J, Yoshikawa H: In vivo three-dimensional skeletal alignment analysis of the hindfoot valgus deformity in patients with rheumatoid arthritis. J Orthop Res 2007; 25: 330–339.LiuHSugamotoKItoharaTTomitaTHashimotoJYoshikawaH:In vivo three-dimensional skeletal alignment analysis of the hindfoot valgus deformity in patients with rheumatoid arthritis.2007;25:330–339.10.1002/jor.20297Search in Google Scholar
Baker JF, Conaghan PG, Emery P, Baker DG, Ostergaard M: Relationship of patient-reported outcomes with MRI measures in rheumatoid arthritis. Ann Rheum Dis 2017; 76: 486–490.BakerJFConaghanPGEmeryPBakerDGOstergaardM:Relationship of patient-reported outcomes with MRI measures in rheumatoid arthritis.2017;76:486–490.10.1136/annrheumdis-2016-209463Search in Google Scholar
Enache L, Popescu CC, Micu M, Cojocaru A, Suta VC, Suta M et al.: Ankle involvement in rheumatoid arthritis – a comparison of inflammatory signs on musculoskeletal ultrasound and magnetic resonance imaging. Med Ultrason 2019; 21: 265–272. doi:10.11152/mu-2038.EnacheLPopescuCCMicuMCojocaruASutaVCSutaMet al:Ankle involvement in rheumatoid arthritis – a comparison of inflammatory signs on musculoskeletal ultrasound and magnetic resonance imaging.2019;21:265–272. doi:10.11152/mu-2038.Open DOISearch in Google Scholar
Belt EA, Kaarela K, Maenpaa H, Kauppi MJ, Lehtinen JT, Lehto MU: Relationship of ankle joint involvement with subtalar destruction in patients with rheumatoid arthritis. A 20-year follow-up study. Joint Bone Spine 2001; 68: 154–157.BeltEAKaarelaKMaenpaaHKauppiMJLehtinenJTLehtoMU:Relationship of ankle joint involvement with subtalar destruction in patients with rheumatoid arthritis. A 20-year follow-up study.2001;68:154–157.10.1016/S1297-319X(00)00242-6Search in Google Scholar
Belt EA, Kaarela K, Kauppi MJ: A 20-year follow-up study of subtalar changes in rheumatoid arthritis. Scand J Rheumatol 1997; 26: 266–268.BeltEAKaarelaKKauppiMJ:A 20-year follow-up study of subtalar changes in rheumatoid arthritis.1997;26:266–268.10.3109/030097497091053149310105Search in Google Scholar
Bruyn GAW, Siddle HJ, Hanova P, Costantino F, Iagnocco A, Sedie AD et al.: Ultrasound of subtalar joint synovitis in patients with rheumatoid arthritis: results of an OMERACT reliability exercise using consensual definitions. J Rheumatol 2019; 46: 351–359.BruynGAWSiddleHJHanovaPCostantinoFIagnoccoASedieADet al:Ultrasound of subtalar joint synovitis in patients with rheumatoid arthritis: results of an OMERACT reliability exercise using consensual definitions.2019;46:351–359.10.3899/jrheum.17149030385707Search in Google Scholar
Wakefield RJ, Freeston JE, O’Connor P, Reay N, Budgen A, Hensor EM et al.: The optimal assessment of the rheumatoid arthritis hindfoot: a comparative study of clinical examination, ultrasound and high field MRI. Ann Rheum Dis 2008; 67: 1678–1682.WakefieldRJFreestonJEO’ConnorPReayNBudgenAHensorEMet al:The optimal assessment of the rheumatoid arthritis hindfoot: a comparative study of clinical examination, ultrasound and high field MRI.2008;67:1678–1682.10.1136/ard.2007.07994718258710Search in Google Scholar
Serban O, Fodor D, Papp I, Micu M, Duma D, Csutak C et al.: Reasons for discordances between ultrasonography and magnetic resonance imaging in the evaluation of the ankle, hindfoot and heel of the patients with rheumatoid arthritis. Med Ultrason 2019; 21: 405–413.SerbanOFodorDPappIMicuMDumaDCsutakCet al:Reasons for discordances between ultrasonography and magnetic resonance imaging in the evaluation of the ankle, hindfoot and heel of the patients with rheumatoid arthritis.2019;21:405–413.10.11152/mu-230431765448Search in Google Scholar
Tenten-Diepenmaat M, van der Leeden M, Vliet Vlieland TPM, Dekker J, Group RAFE: Multidisciplinary recommendations for diagnosis and treatment of foot problems in people with rheumatoid arthritis. J Foot Ankle Res 2018; 11: 37.Tenten-DiepenmaatMvan der LeedenMVliet VlielandTPMDekkerJGroupRAFE:Multidisciplinary recommendations for diagnosis and treatment of foot problems in people with rheumatoid arthritis.2018;11:37.10.1186/s13047-018-0276-z603074629988776Search in Google Scholar
Wilkinson VH, Rowbotham EL, Grainger AJ: Imaging in foot and ankle arthritis. Semin Musculoskelet Radiol 2016; 20: 167–174.WilkinsonVHRowbothamELGraingerAJ:Imaging in foot and ankle arthritis.2016;20:167–174.10.1055/s-0036-158111727336451Search in Google Scholar
Sant’Ana Petterle G, Natour J, Rodrigues da Luz K, Soares Machado F, dos Santos MF, da Rocha Correa Fernandes A et al.: Usefulness of US to show subclinical joint abnormalities in asymptomatic feet of RA patients compared to healthy controls. Clin Exp Rheumatol 2013; 31: 904–912.Sant’Ana PetterleGNatourJRodrigues da LuzKSoares MachadoFdos SantosMFda Rocha Correa FernandesAet al:Usefulness of US to show subclinical joint abnormalities in asymptomatic feet of RA patients compared to healthy controls.2013;31:904–912.Search in Google Scholar
D’Agostino MA, Terslev L, Wakefield R, Ostergaard M, Balint P, Naredo E et al.: Novel algorithms for the pragmatic use of ultrasound in the management of patients with rheumatoid arthritis: from diagnosis to remission. Ann Rheum Dis 2016; 75: 1902–1908.D’AgostinoMATerslevLWakefieldROstergaardMBalintPNaredoEet al:Novel algorithms for the pragmatic use of ultrasound in the management of patients with rheumatoid arthritis: from diagnosis to remission.2016;75:1902–1908.10.1136/annrheumdis-2016-20964627553213Search in Google Scholar
Aguila Maldonado R, Ruta S, Valuntas ML, Garcia M: Ultrasonography assessment of heel entheses in patients with spondyloarthritis: a comparative study with magnetic resonance imaging and conventional radiography. Clin Rheumatol 2017; 36: 1811–1817.Aguila MaldonadoRRutaSValuntasMLGarciaM:Ultrasonography assessment of heel entheses in patients with spondyloarthritis: a comparative study with magnetic resonance imaging and conventional radiography.2017;36:1811–1817.10.1007/s10067-017-3723-528647902Search in Google Scholar
Luukkainen R, Ekman P, Luukkainen P, Koski JM: Ultrasonographic findings in metatarsophalangeal and talocrural joints in healthy persons. Clin Rheumatol 2009; 28: 311–313.LuukkainenREkmanPLuukkainenPKoskiJM:Ultrasonographic findings in metatarsophalangeal and talocrural joints in healthy persons.2009;28:311–313.10.1007/s10067-008-1045-319052837Search in Google Scholar
Micu MC, Fodor D, Micu R, Bolboacča SD, Ionescu R: Pregnant versus non-pregnant healthy subjects – a prospective longitudinal musculoskeletal ultrasound study concerning the spectrum of normality. Med Ultrason 2018; 20: 319–327.MicuMCFodorDMicuRBolboacčaSDIonescuR:Pregnant versus non-pregnant healthy subjects – a prospective longitudinal musculoskeletal ultrasound study concerning the spectrum of normality.2018;20:319–327.10.11152/mu-163030167585Search in Google Scholar
Gutierrez M, Pineda C, Salaffi F, Raffeiner B, Cazenave T, Martinez-Nava GA et al.: Is ankle involvement underestimated in rheumatoid arthritis? Results of a multicenter ultrasound study. Clin Rheumatol 2016; 35: 2669–2678.GutierrezMPinedaCSalaffiFRaffeinerBCazenaveTMartinez-NavaGAet al:Is ankle involvement underestimated in rheumatoid arthritis? Results of a multicenter ultrasound study.2016;35:2669–2678.10.1007/s10067-016-3226-927094944Search in Google Scholar
Aletaha D, Landewe R, Karonitsch T, Bathon J, Boers M, Bombardier C et al.: Reporting disease activity in clinical trials of patients with rheumatoid arthritis: EULAR/ACR collaborative recommendations. Ann Rheum Dis 2008; 67: 1360–1364.AletahaDLandeweRKaronitschTBathonJBoersMBombardierCet al:Reporting disease activity in clinical trials of patients with rheumatoid arthritis: EULAR/ACR collaborative recommendations.2008;67:1360–1364.10.1136/ard.2008.09145418791055Search in Google Scholar