[1] Vrije Univ Amsterdam, Amsterdam Publ Hlth Res Inst, Dept Publ & Occupat Hlth, Amsterdam UMC, Van der Boechorststr 7, NL-1081 BT Amsterdam, Netherlands
[2] Zorginst Nederland, Dept Care, Willem Dudokhof 1, NL-1112 ZA Diemen, Netherlands
[3] Vrije Univ Amsterdam, Med Lib, De Boelelaan 1117, NL-1081 HV Amsterdam, Netherlands
[4] Erasmus Univ, Erasmus Sch Hlth Policy & Management Hlth Care Gov, Burgemeester Oudlaan 50, NL-3062 PA Rotterdam, Netherlands