1. Medical Biochemistry Department, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
2. Laboratory Medicine Department, College of Applied Medical Science, Umm Al Qura University, Makkah 21955, Saudi Arabia
3. Clinical Pathology Department, National Cancer Institute, Cairo University, Cairo 11796, Egypt
4. Clinical Pathology Department, Al Azhar University, Cairo 11651, Egypt
5. Clinical Chemistry Department, Al Noor Specialist Hospital, Makkah 21955, Saudi Arabia
6. Cancer Epidemiology and Biostatistics Department, National Cancer Institute, Cairo University, Cairo 11796, Egypt
7. Kuwait Cancer Registry, 70653 Kuwait, Kuwait