Kee, A. R.
Yip, V. C. H.
Tay, E. L. T.
Lim, C. W.
Cheng, J.
Teo, H. Y.
Chua, C. H.
Yip, L. W. L.
Article History
Received: 26 April 2020
Accepted: 23 October 2020
First Online: 10 November 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of the National Healthcare Group and was conducted in accordance to the ethical standards stated in the Declaration of Helsinki. Written informed consent for study participation was obtained from all subjects.
: Not applicable.
: The authors declare that they have no competing interests.