1. Institute of Social Medicine, Epidemiology and Health Economics, Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.
2. Department of Internal and Integrative Medicine, Immanuel Krankenhaus Berlin, Berlin, Germany.
3. Department of Pediatric Oncology/Hematology, Otto-Heubner Centre for Pediatric and Adolescent Medicine (OHC), Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.
4. Department of Pediatrics, Faculty of Medicine, University of São Paulo, São Paulo, Brazil.
5. Department of Internal and Integrative Medicine, Evang. Kliniken Essen-Mitte, Faculty of Medicine, University of Duisburg-Essen, Essen, Germany.