*Alexandria Clinical Oncology Department, Alexandria University, Alexandria

§Department of Clinical Oncology, Kafr Elsheikh University, Kafr Elsheikh, Egypt

†Vihiga County and Referral Hospital, Vihiga County, Kenya

‡Department of Radiation Oncology, Loyola University Chicago, Loyola University Medical Center, Stritch School of Medicine, Cardinal Bernardin Cancer Center, Maywood, IL

The study was approved by the Ethics Committee of Alexandria University School of medicine and compiled with the International Guidelines for Research Ethics.

A.A.E.: conception and design; R.E., J.M.K., T.R., A.A.M., H.S., M.A.M.M., and A.A.E.: administrative support, provision of study material or patients, data analysis and interpretation, and manuscript writing; J.M.K.: collection and assembly of data.

The authors declare no conflicts of interest.

Correspondence: Rasha Elsaka, MD, PhD, Alexandria Clinical Oncology Department, Alexandria University, Alexandria 21131, Egypt. E-mail: [email protected].