[1] NIVEL, Netherlands Inst Hlth Serv Res, NL-3500 BN Utrecht, Netherlands
[2] Univ Groningen, Dept Gen Practice, Fac Med Sci, Groningen, Netherlands
[3] Univ Utrecht, Fac Social & Behav Sci, Dept Methodol & Stat, Utrecht, Netherlands
[4] Univ Utrecht, Fac Social & Behav Sci, Dept Psychol, Utrecht, Netherlands