Funding for this research was provided by:
Biotropics Sdn. Bhd (NN-2017-036)
Received: 29 March 2020
Accepted: 20 September 2020
First Online: 19 October 2020
Ethics approval and consent to participate
: The study protocol has been approved by the Research Ethics Committee Universiti Kebangsaan Malaysia (RECUKM) (Reference number: UKM PPI/111/8/JEP-2016-611). Written informed consent was also obtained from all participants before the data collection.
: Not applicable.
: The authors declare that they have no competing interests.