Text and Data Mining valid from 2020-03-05
Received: 15 January 2020
Accepted: 27 February 2020
First Online: 5 March 2020
Ethics approval and consent to participate
: Ethical approval from Cairo University hospitals research ethics committee was obtained (N-18-2017)<b>.</b> Written informed consents were obtained from participants before inclusion.
: Not applicable
: The authors declare that they have no competing interests.