Received: 7 August 2020
Accepted: 26 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: The current study was conducted following Good Clinical Practice guidelines laid down in the Helsinki Declaration 1975 and Approval of Faculty of Medicine, Helwan University ethical committee (REC-FMHU) were obtained. Verbal consent was obtained from the enrolled subjects (66-2020). The ethical committee when received the study protocol for approval, a clear statement that the subjects consents will be verbal consents was mentioned in the protocol and the investigator application form. The reason for using the verbal consents was the expected large number of study subjects.
: Not applicable.
: The authors declare that they have no competing interests.