1. Department of General Surgery; King Faisal Specialist Hospital and Research Centre; Riyadh Saudi Arabia
2. Department of Pathology; King Faisal Specialist Hospital and Research Centre; Riyadh Saudi Arabia
3. Department of Radiation Oncology; King Faisal Specialist Hospital and Research Centre; Riyadh Saudi Arabia
4. Department of Medical Oncology; King Faisal Specialist Hospital and Research Centre; Riyadh Saudi Arabia