[1] Univ Basel, Dept Pharmaceut Sci, Div Clin Pharm & Epidemiol, Basel Pharmacoepidemiol Unit, Basel, Switzerland
[2] Univ Basel Hosp, Hosp Pharm, CH-4031 Basel, Switzerland
[3] Univ Basel Hosp, Dept Dermatol, Petersgraben 4, CH-4031 Basel, Switzerland
[4] Univ Zurich Hosp, Dept Dermatol, CH-8091 Zurich, Switzerland
[5] Boston Univ, Sch Publ Hlth, Boston Collaborat Drug Surveillance Program, Lexington, MA USA
[6] Berufsverband Deutsch Dermatol eV, Berlin, Germany