Funding for this research was provided by:
Ministry of Education – Kingdom of Saudi Arabi
Text and Data Mining valid from 2019-07-04
Received: 30 December 2018
Accepted: 18 June 2019
First Online: 4 July 2019
Ethics approval and consent to participate
: This study was a secondary analysis of publicly available data, therefore ethical review and consent were not required.
: Not applicable.
: The authors declare that they have no competing interests.