1. Department of Visceral Surgery and Medicine, Bern University Hospital, University of Bern, Bern, Switzerland
2. Department of Nuclear Medicine, University Hospital, University of Geneva, Geneva, Switzerland
3. Department of Medical Oncology, Bern University Hospital, University of Bern, Bern, Switzerland
4. Clinical Trials Unit Bern, Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
5. Department of Endocrinology, Diabetes, and Metabolism, Basel University Hospital, University of Basel, Basel, Switzerland
6. Institute for Clinical Epidemiology and Biostatistics, Department of Clinical Research, Basel University Hospital, University of Basel, Basel, Switzerland
7. Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada