1. Endocrinology & Nutrition, Cliniques Universitaires St-Luc, Belgium
2. Sardenya Primary Health Care Center, EAP Sardenya-Biomedical Research Institute, Spain
3. Department of Internal Medicine, University of Ioannina, Greece
4. Centre Hospitalier de Luxembourg, Luxembourg
5. Department of Endocrinology, UZ Gasthuisberg, Belgium
6. OLV Ziekenhuis, Belgium