This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Velikova T, Lazova S, Perenovska P, Miteva D, Velikov P, Petrova G, et al. [Vitamin D status in children with chronic lung diseases.] Modern Medicine. 2018;(62):10-17. Bulgarian.Search in Google Scholar
Walker VP, Modlin RL. The vitamin D connection to pediatric infections and immune function. Pediatr Res. 2009;65(5):106-13.Search in Google Scholar
Botsova V, Kostadinova E. [Vitamin D – from ancient times to the present.] GP news. 2018; 8(219):26-8. BulgarianSearch in Google Scholar
Botsova V, Kostadinova E, Yordanova LP, Petrova Ch, Elkina S, Hristova I, et al. [Major risk factors for vitamin D deficiency in children with idiopathic nephrotic syndrome]. Pediatriya. 2017;1:36-40. BulgarianSearch in Google Scholar
Borisova AM, Boyanov М, Kolarov Z, Popivanov P, Shinkov А, Stoylov R, et al. [Recommendations for diagnosis, prevention and treatment of vitamin D deficiency.] Sofia: Bulgarian Society of Endocrinology; 2013. p. 9-20. Bulgarian.Search in Google Scholar
Loeb M, Dang AD, Thiem VD, Thanabalan V, Wang B, Nguyen NB, et al. Effect of Vitamin D supplementation to reduce respiratory infections in children and adolescents in Vietnam: A randomized controlled trial. Influenza Other Respire Viruses. 2019;13(2):176-83.Search in Google Scholar
Burgazliev G, Georgiev T. [What is vitamin D – the vitamin-hormone?] Science Dietetics. 2010; 2:32-4. Bulgarian.Search in Google Scholar
Georgieva E, Anadoliyska A, Petkova B, Ardalieva M, Marinova M, Iliev D, et al. [Level of vitamin D and bronchobstruction in childhood.] Pediatriya. 2012;52:43-5. ISSN: 0479-7876. Bulgarian.Search in Google Scholar
Urashima M, Segawa T, Okazaki M, Kurihara M, Wada Y, Ida H. Randomized trial of vitamin D supplementation to prevent seasonal influenza A in schoolchildren. Am j clin nutr. 2010;91(5):1255-60.Search in Google Scholar
Esposito S, Lelii M. Vitamin D and respiratory tract infections in childhood. BMC Infect Dis. 2015;15:487.Search in Google Scholar
Cebey-López M, Pardo-Seco J, Gómez-Carballa A, Martinón-Torres N, Rivero-Calle I, Justicia A, et al. Role of Vitamin D in hospitalized children with lower tract acute respiratory infections. J Pediatr Gastroenterol Nutr. 2016;62(3):479-85.Search in Google Scholar
Carlos A. Camargo. Chapter 112 – Vitamin D, Acute Respiratory Infection, and Asthma/ Chronic Obstructive Pulmonary Disease. Academic Press. 2018;2:1095-120.Search in Google Scholar
Ingham T, Jones B, Camargo C, Kirman J, Dowell A, Crane J, et al. Association of Vitamin D Deficiency with Severity of Acute Respiratory Infection: A Case-Control Study in New Zealand Children. Eur Resp J. 2014;44:439.Search in Google Scholar
Jaybhaye AP, Sangle AL, Ugra D, Chittal RY. A Hospital-Based Study of Vitamin D Levels in Children With Recurrent Respiratory Infections. Cureus. 2022;14(8):e27864.Search in Google Scholar
Oktaria V, Danchin M, Triasih R, Soenarto Y, Bines JE, Ponsonby AL, et al.The incidence of acute respiratory infection in Indonesian infants and association with vitamin D deficiency. PLoS One. 2021;16(3):e0248722.Search in Google Scholar