1. Unit of Reproductive Endocrinology, 1st Department of Obstetrics and Gynecology, Medical School, Aristotle University of Thessaloniki , Thessaloniki 56403 , Greece
2. Laboratory for the Research of Musculoskeletal System “Th. Garofalidis”, School of Medicine, National and Kapodistrian University of Athens, KAT General Hospital , Athens 14561 , Greece
3. Unit for Human Reproduction, 1st Department of Obstetrics and Gynecology, Aristotle University of Thessaloniki , Thessaloniki 11527 , Greece
4. Clinical Epidemiology Laboratory, Faculty of Nursing, National and Kapodistrian University of Athens , Athens 11527 , Greece