1. Chairman, Department of Pathology, College of Medicine, King Saud University, P. O. Box 2925, Riyadh 11461, Saudi Arabia
2. Director of Electron Microscopy, Department of Pathology and Laboratory Medicine, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
3. Assistant Professor, Department of Obstetrics and Gynecology, College of Medicine, King Saud University
4. Professor, Department of Obstetrics and Gynecology, College of Medicine, King Saud University