[1] Erasmus Univ, Dept Gen Practice, NL-3000 DR Rotterdam, Netherlands
[2] Municipal Hlth Serv, NL-3000 LP Rotterdam, Netherlands
[3] Erasmus Univ, Dept Med Psychol & Psychotherapy, NL-3000 DR Rotterdam, Netherlands
[4] Univ Rotterdam Hosp, Sophia Childrens Hosp, Dept Paediat, NL-3000 CB Rotterdam, Netherlands