Text and Data Mining valid from 2019-01-10
Received: 1 October 2018
Accepted: 3 January 2019
First Online: 10 January 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The study has been carried out under compliance of ethical issues. The study was approved by the institutional Review Committee of College of Medicine, King Saud University Riyadh. We used the STROBE case–control checklist for writing our report.
: Written informed consent was obtained from each subject.