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Article History

Received: 10 April 2018

Accepted: 8 June 2018

First Online: 8 August 2018

Ethics approval and consent to participate

: Ethical approval (approval no. NF-016-14) for this study was obtained from the Ethics Committee of the UKM Medical Centre, Cheras, Kuala Lumpur, Malaysia. Participation in the study was voluntary and no compensation was paid to the participants. Written consent were taken from the respondents. Confidentiality and anonymity was maintained.

: Not applicable.

: The authors declare that they have no competing interests.

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