1. College of Medicine and Health Sciences, Sultan Qaboos University, Muscat 123, Oman
2. Pathology Department, Sultan Qaboos University Hospital, Muscat 123, Oman
3. Surgery Department, Sultan Qaboos University, Muscat 123, Oman
4. Ministry of Health, Muscat 393, Oman
5. Ophthalmology Department, Oman Medical Specialty Board, Muscat 1422, Oman
6. Research & Studies Section, Oman Medical Specialty Board, Muscat 1422, Oman
7. Sultan Qaboos Comprehensive Cancer Care and Research Center, Muscat 123, Oman