Article History
Received: 24 September 2019
Accepted: 13 February 2020
First Online: 4 March 2020
Ethics approval and consent to participate
: The research was approved by the scientific committee, Kuwait Cancer Control Center, both scientifically and ethically. Being a retrospective study, there was no consent for patients’ participation required in the study.
: Not applicable.
: The authors declare that they have no competing interests.