Received: 7 November 2019
Accepted: 30 April 2020
First Online: 8 July 2020
Ethics approval and consent to participate
: The protocol was approved by the institutional review boards of Ain-Shams University Hospitals, Faculty of medicine and Hematology/Oncology unit of National Cancer Institute (Reference number FMASU FWA 00006444), and the procedures respected the ethical standards in Helsinki declaration of 1964. Written informed consents were obtained from patients’ guardians to use their samples in this study.
: Not applicable
: The authors declare that they have no competing interests.