Text and Data Mining valid from 2018-12-26
Received: 17 October 2018
Accepted: 10 December 2018
First Online: 26 December 2018
Compliance with Ethical Standards
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: The study protocol was approved by the Ethical Committee of Faculty of Medicine, Cairo University.
: Participants were informed about the objectives, methods, and possible impact of the study and a written consent was obtained.