1. University of Cologne, University of Cologne Institute for Medical
Sociology Health Services Research and Rehabilitation Science, Köln,
Germany
2. Department of Rehabilitation Sciences, TU Dortmund University,
Dortmund, Germany
3. NOF, Healthcare Network for critically ill children, Hannover,
Germany
4. Clinic for pediatrics, Universitätsklinikum Essen, Essen,
Germany
5. Clinic for Pediatrics and Adolescent Medicine, Clinical Center
Dortmund, Dortmund, Germany
6. Pediatric Oncology and Hematology, University Hospital Cologne, Köln,
Germany
7. Pediatric Research Network, University Hospital Essen, Essen,
Germany