1. 1st Department of Internal Medicine, Unit of Endocrinology, Laikon Hospital, 11527 Athens, Greece
2. 1st Department of Pathology, National and Kapodistrian University of Athens, Laikon Hospital, 11527 Athens, Greece
3. Laboratory of Biology, Department of Basic Medical Sciences, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
4. Department of Nephrology and Renal Transplantation, National and Kapodistrian University of Athens, Laikon Hospital, 11527 Athens, Greece