Received: 24 September 2018
Accepted: 2 January 2019
First Online: 10 January 2019
Ethics approval and consent to participate
: Approval for distributing the questionnaires at Hospital Pulau Pinang was obtained from Medical Research and Ethics Committee (MREC), Malaysia (NMRR-17-3186-39,237).
: Not applicable.
: The authors declare that they have no conflicts of interest in this work.
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