[1] Univ Med Ctr Groningen, Dept Epidemiol, NL-9700 RB Groningen, Netherlands
[2] Univ Med Ctr Utrecht, Julius Ctr Hlth Sci & Primary Hlth Care, NL-3508 GA Utrecht, Netherlands
[3] Natl Inst Publ Hlth & Environm, Ctr Infect Dis Control, Epidemiol & Surveillance Unit, NL-3720 BA Bilthoven, Netherlands
[4] Radboud Univ Nijmegen, Med Ctr, Sci Inst Qual Healthcare IQ Healthcare, NL-6500 HB Nijmegen, Netherlands
[5] Univ Groningen, Dept Pharm, Unit Pharmacoepidemiol & Pharmacoecon, Groningen, Netherlands