Received: 8 January 2020
Accepted: 27 November 2020
First Online: 5 December 2020
Ethics approval and consent to participate
: The study was approved by the Helsinki Ethics Committee of Gaza Strip, as well as the Ethics Committee for Research Involving Human Subjects (JKEUPM) of the Faculty of Medicine and Health Sciences, Universiti Putra Malaysia. Permission to conduct the study in the UNRWA clinics was obtained from the Health Affairs Center of The United Nations Relief and Works Agency for Palestine Refugees in the Near East (UNRWA) in Gaza Strip.
: Written informed consent was obtained from the participants for publication of this work.
: The authors declare that they have no competing interests.