[1] Univ Amsterdam, Dept Gen Practice & Elderly Care Med, Amsterdam Publ Hlth Res Inst, Med Ctr,Locat VUmc, Amsterdam, Netherlands
[2] Univ Amsterdam, Dept Publ & Occupat Hlth, Amsterdam Publ Hlth Res Inst, Med Ctr,Locat VUmc, Amsterdam, Netherlands
[3] Univ Amsterdam, Dept Gen Practice Family Med, Amsterdam Publ Hlth Res Inst, Med Ctr,Locat AMC, Amsterdam, Netherlands
[4] Univ Groningen, Univ Med Ctr Groningen, Ctr Educ Dev & Res Hlth Profess, Groningen, Netherlands