[1] Univ Limburg, Dept Epidemiol, NL-6200 MD Maastricht, Netherlands
[2] Univ Amsterdam, Acad Med Ctr, Dept Clin Epidemiol & Biostat, NL-1100 DE Amsterdam, Netherlands
[3] UIPS, Dept Pharmacoepidemiol & Pharmacotherapy, NL-3508 TB Utrecht, Netherlands