1. From the Departments of Obstetrics and Gynecology, College of Medicine, King Saud University; Riyadh.
2. From the Departments of Obstetrics and Gynecology, Maternity and Children's Hospital; Riyadh.
3. From the Departments of Cytopathology, King Saud University; Riyadh.
4. From the College of Applied Medical Sciences, King Saud University; Riyadh.