1. Department of General Internal and Emergency Medicine and Department of Endocrinology Diabetology and Metabolism Medical University Clinic Aarau Switzerland
2. Endocrinology, Diabetology and Metabolism Department of Internal Medicine and Department of Clinical Research University Hospital Basel Basel Switzerland
3. Stoffwechselzentrum Solothurn Switzerland
4. Clinical Trial Unit Department of Clinical Research University Hospital Basel and University of Basel Basel Switzerland
5. Institute of Primary Health Care (BIHAM) University of Bern Switzerland
6. Department of General Internal Medicine Inselspital Bern University Hospital University of Bern Bern Switzerland
7. Basel Institute for Clinical Epidemiology and Biostatistics Department of Clinical Research University Hospital Basel and University of Basel Basel Switzerland
8. Department of Health Research Methods Evidence, and Impact McMaster University Hamilton Ontario Canada