[1] Childrens Hosp Lucerne, Dept Pediat, Spitalstr, CH-6000 Luzern, Switzerland
[2] Univ Zurich, Univ Children Hosp Zurich, Dept Pediat, Steinwiesstr 75, CH-8032 Zurich, Switzerland
[3] Royal Childrens Hosp, Trauma Serv, Melbourne, Vic 3052, Australia
[4] Monash Univ, Sch Publ Hlth & Prevent Med, Melbourne, Vic 3004, Australia
[5] Univ Zurich, Univ Childrens Hosp Zurich, Dept Psychosomat & Psychiat, Steinwiesstr 75, CH-8032 Zurich, Switzerland
[6] Univ Zurich, Univ Childrens Hosp Zurich, Childrens Res Ctr, Steinwiesstr 75, CH-8032 Zurich, Switzerland
[7] Univ Zurich, Dept Psychol, Div Child & Adolescent Hlth Psychol, Binzmuhlestr 14, CH-8050 Zurich, Switzerland
[8] Univ Zurich, Univ Childrens Hosp Zurich, Childrens Res Ctr, CH-8032 Zurich, Switzerland
[9] Childrens Hosp Lucerne, Dept Pediat Surg, Spitalstr, CH-6000 Luzern, Switzerland
[10] Childrens Hosp Lucerne, Emergency Dept, Spitalstr, CH-6000 Luzern, Switzerland
[11] Univ Zurich, Univ Children Hosp Zurich, Emergency Dept, Steinwiesstr 75, CH-8032 Zurich, Switzerland