[1] Nivel Netherlands Inst Hlth Serv Res, POB 1568, NL-3500 BN Utrecht, Netherlands
[2] Breuer & Intraval, Res & Consultancy, Res Dept, Groningen, Netherlands
[3] Maastricht Univ, Dept Family Med, Care & Publ Hlth Res Inst CAPHRI, Maastricht, Netherlands
[4] Dutch Ctr Expertise Hlth Dispar, Pharos, Utrecht, Netherlands
[5] Radboud Univ Nijmegen, Radboud Inst Hlth Sci, Dept Primary & Community Care, Med Ctr, Nijmegen, Netherlands
[6] Univ Boras, Fac Caring Sci Work Life & Social Welf, Boras, Sweden