1 Division of Endocrinology and Metabolism, First Department of Internal Medicine, Medical School, AHEPA Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece. karraspiros@yahoo.gr.
2 Division of Neonatology, Department of Pediatrics, Medical University of South Carolina Children's Hospital, Charleston, SC, USA.
3 Division of Endocrinology and Metabolism, First Department of Internal Medicine, Medical School, AHEPA Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece.