[1] United Arab Emirates Univ, Fac Med & Hlth Sci, Dept Obstet & Gynecol, Al Ain, U Arab Emirates
[2] Al Ain Hosp, Dept Obstet & Gynecol, Al Ain, U Arab Emirates
[3] United Arab Emirates Univ, Fac Med & Hlth Sci, Dept Community Med & Biostat, Al Ain, U Arab Emirates
[4] United Arab Emirates Univ, Fac Sci, Dept Biol & Stat, Al Ain, U Arab Emirates