1. Department of Pediatrics, Children’s Hospital Lucerne, Spitalstrasse, CH-6000 Lucerne, Switzerland
2. Department of Pediatrics, University’s Children Hospital Zurich, University of Zurich, Steinwiesstrasse 75, CH-8032 Zurich, Switzerland
3. Trauma Service, The Royal Children’s Hospital, Melbourne, VIC 3052, Australia
4. School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC 3004, Australia
5. Department of Psychosomatics and Psychiatry and Children’s Research Center, University Children’s Hospital Zurich, University of Zurich, Steinwiesstrasse 75, CH-8032 Zurich, Switzerland
6. Division of Child and Adolescent Health Psychology, Department of Psychology, University of Zurich, Binzmuehlestrasse 14, CH-8050 Zurich, Switzerland
7. Children’s Research Center, University Children’s Hospital of Zurich, University of Zurich, CH-8032 Zurich, Switzerland
8. Department of Pediatric Surgery, Children’s Hospital Lucerne, Spitalstrasse, CH-6000 Lucerne, Switzerland
9. Emergency Department, Children’s Hospital Lucerne, Spitalstrasse, CH-6000 Lucerne, Switzerland
10. Emergency Department, University’s Children Hospital Zurich, University of Zurich, Steinwiesstrasse 75, CH-8032 Zurich, Switzerland