Received: 13 September 2019
Accepted: 22 May 2020
First Online: 3 June 2020
Ethics approval and consent to participate
: All subjects were informed of the general aim of the study, and their participation was fully voluntary. Informed consent had been obtained and approved by the ethics committee for clinical research of the Faculty of Medicine ASU and El Mataria Teaching Hospital (date of ethical approval: 12/6/2016; reference number: FMASU MD 142/2016).
: Not applicable.
: The authors declare that they have no competing interests.