Funding for this research was provided by:
Ministry of Education – Kingdom of Saudi Arabi (Longitudinal Research Grant Schema (LRGS/BU/2012/UKM-UKM/K//01))
Text and Data Mining valid from 2019-08-22
Received: 16 January 2018
Accepted: 16 August 2019
First Online: 22 August 2019
Ethics approval and consent to participate
: This study was approved by the Research Ethical Committee of the University Kebangsaan Malaysia (LRGS TUA-NN-060-2013), and written consent was obtained from all respondents.
: Not applicable.
: The authors declare that they have no competing interests.