IFT Institut für Tabakforschung GmbH, Chausseestr. 51A, 10115 Berlin, Germany
Michael McEwan
BAT British American Tobacco, Regents Park Road, Millbrook, Southampton SO15, 8TL, United Kingdom of Great Britain and Northern Ireland
Thomas Göen
Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schillerstr. 25, 91054 Erlangen, Germany