The Principal Investigator:

Prof. Amal Samy Ibrahim, Professor of Epidemiology, National Cancer Institute, Cairo University, Cairo, Egypt.

e-mail: amalsamyibrahim@yahoo.com

The Executive Director:

Prof. Hany Hussein, Professor of Pediatric Oncology, National Cancer Institute, Cairo University, Cairo, Egypt.

Director of Tanta Cancer Center.

The co-Investigator:

Dr. Kadry Ismail, Consultant of Surgical Oncology, Tanta Cancer Center.

Dr. Ahmed Hablas, Consultant of Surgical Oncology Tanta Cancer Center.

The Data Supervisors:

Dr. Ibrahim Abdel Bar.

Dr. Mohammad Ramadan.