1. Endocrine Unit, Athens Medical Centre, 65403 Athens, Greece
2. Private Practice, Venizelou Str., 65302 Kavala, Greece
3. Center for Diabetes and Endocrine Research, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA
4. Private Practice, Gerokostopoulou 24, 26221 Patra, Greece
5. Private Practice, Tzanaki Emmanouil 17, 73134 Chania, Greece