Text and Data Mining valid from 2020-01-04
Received: 15 September 2019
Accepted: 9 December 2019
First Online: 4 January 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of King Saud Medical City, and the written informed consent was also obtained from each participant in advance.
: Not applicable.
: The authors declare that they have no competing interests.