Funding for this research was provided by:
Fakulti Perubatan dan Sains Kesihatan, Universiti Putra Malaysia (UPM/700-2/1/GP-IPS/2018/9593800, UPM/800-3/3/1/GPB/2018/9659600, UPM/SPS/GS48750)
Received: 7 March 2019
Accepted: 29 January 2020
First Online: 7 February 2020
Ethics approval and consent to participate
: Ethical approval for this study was obtained from the National Medical Research Register (NMRR-16-805-30503). Written consent was obtained from the participants prior to the data collection.
: Not applicable.
: The authors declare that they have no competing interests.