1 Department of Pediatrics, Division of Oncology and Hematology, Charité - Universitätsmedizin Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Berlin, Germany.
2 Integrated Curriculum for Anthroposophic Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany.
3 Department of Pediatrics, Faculty of Medicine, University of São Paulo, São Paulo, Brazil.