Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Konstantinoupoleos 49, GR54642, Thessaloniki, Greece. Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Konstantinoupoleos 49, GR54642, Thessaloniki, Greece. psarafidis11@yahoo.gr. 2nd Department of Obstetrics and Gynecology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece.