1. University Department of Medicine, Clinic for Endocrinology/Metabolism/Clinical Nutrition, Kantonsspital Aarau, Aarau, Switzerland2Medical Faculty of the University of Basel, Basel, Switzerland
2. General Medicine, Dr M. Deppeler, Zollikofen, Switzerland
3. Basel Institute for Clinical Epidemiology and Biostatistics, Department of Clinical Research, University Hospital Basel, Basel, Switzerland5Institute of Nuclear Medicine, University Hospital Bern, Bern, Switzerland
4. Basel Institute for Clinical Epidemiology and Biostatistics, Department of Clinical Research, University Hospital Basel, Basel, Switzerland6Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada