1. Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
2. School of Physical Education and Sport Science, Aristotle University of Thessaloniki, Thessaloniki, Greece
3. School of Physical Education and Sport Sciences,University of Thessaly, Karies, Trikala, Greece
4. Department of Physiology, Fayoum University, Fayoum, Egypt