Funding for this research was provided by:
Malaysian Health Promotion Board (4-LPKM/04/061/06/11)
Text and Data Mining valid from 2019-11-07
Received: 2 May 2019
Accepted: 28 October 2019
First Online: 7 November 2019
Ethics approval and consent to participate
: This study was approved by the Research Ethics Committee of the University of Otago, New Zealand (12/140) and the Medical Research Ethics Committee, Ministry of Health, Malaysia (NMRR-12-392-11047). All participants gave written informed consent to participate in the study.
: Not applicable
: The authors declare that they have no competing interests.