1. College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
2. College of Graduate Health Sciences, University of Tennessee Health Science Center, Memphis, Tennessee, USA
3. Department of Obstetrics and Gynecology, King Faisal Specialist Hospital and Research Centre, King Fahd Medical City, Riyadh, Saudi Arabia
4. Department of Obstetrics and Gynecology, King Fahd Medical City, Riyadh, Saudi Arabia