1. From the Department for Pediatric and Adolescent Medicine, Elisabeth Hospital Essen, Essen, Germany
2. Professorship of integrative pediatrics, Faculty of Health, University Witten/Herdecke, Witten/Herdecke, Germany
3. Institute for General Practice and Interprofessional Care, University Hospital Tübingen, Tübingen, Germany
4. Robert Bosch Center for Integrative Medicine and Health, Bosch Health Campus, Stuttgart, Germany
5. Department of Psychology and Psychotherapy, Chair of Research Methodology and Statistics in Psychology, University Witten/Herdecke, Witten/Herdecke, Germany.