[1] Univ Zurich Hosp, Dept Psychiat & Psychotherapy, CH-8091 Zurich, Switzerland
[2] Univ Konstanz, Dept Psychol, Clin Psychol & Behav Neurosci Unit, Constance, Germany
[3] Univ Childrens Hosp Zurich, Dept Psychosomat & Psychiat, Steinwiesstr 75, CH-8032 Zurich, Switzerland
[4] Univ Zurich, Dept Child & Adolescent Hlth Psychol, Inst Psychol, CH-8006 Zurich, Switzerland