[1] Aristotle Univ Thessaloniki, Hippokrat Hosp, Propaedeut Dept Internal Med 2, Med Sch, Thessaloniki, Greece
[2] Aristotle Univ Thessaloniki, Dept Obstet & Gynecol 1, Thessaloniki, Greece
[3] VAMC, Washington, DC USA
[4] George Washington Univ, Washington, DC USA