[1] Inspectorate Healthcare, Drug Safety Unit, NL-2500 BC The Hague, Netherlands
[2] Erasmus Med Ctr Rotterdam, Dept Epidemiol & Biostat, Pharmacoepidemiol Unit, Rotterdam, Netherlands
[3] St Antonius Hosp, Dept Rheumatol, Nieuwegein, Netherlands
[4] St Antonius Hosp, Dept Dermatol, Nieuwegein, Netherlands