1. From Utrecht Institute for Pharmaceutical Sciences (S.P., A.L., B.L., A.d.B., T.v.S., F.d.V.), Division of Pharmacoepidemiology and Pharmacotherapy, University Utrecht, Utrecht, The Netherlands; MRC Epidemiology Resource Centre (C.C., T.v.S., F.d.V.), University of Southampton, Southampton General Hospital, Southampton, UK; Institute of Musculoskeletal Sciences (C.C.), University of Oxford, Oxford, UK.