[1] Free Univ Amsterdam, Med Ctr, Dept Gen Practice, NL-1081 BT Amsterdam, Netherlands
[2] Free Univ Amsterdam, Med Ctr, EMGO Inst, NL-1081 BT Amsterdam, Netherlands
[3] Free Univ Amsterdam, Med Ctr, Psychiat Consultat & Liaison Serv, NL-1081 BT Amsterdam, Netherlands
[4] Univ Groningen, Med Ctr, Dept Psychiat, Groningen, Netherlands
[5] Vrije Univ Amsterdam, Med Lib, NL-1081 HV Amsterdam, Netherlands
[6] Univ Amsterdam, Acad Med Ctr, Amsterdam Sch Nursing, NL-1105 AZ Amsterdam, Netherlands
[7] Univ Groningen, Med Ctr, Dept Internal Med, Groningen, Netherlands