1. Department of Paediatrics, Fribourg Hospital HFR, Fribourg, Switzerland / Faculty of Science and Medicine, University of Fribourg, Switzerland
2. Department of Paediatrics, Fribourg Hospital HFR, Fribourg, Switzerland / Centre médical de La Chapelle, Geneva, Switzerland
3. Children's Hospital of Eastern Switzerland, St Gallen, Switzerland
4. Institute of Complementary and Integrative Medicine, University of Bern, Switzerland