Lin, Jingping http://orcid.org/0000-0003-1431-5348
Chua, Mui Teng
Article History
Received: 23 August 2019
Accepted: 7 January 2020
First Online: 7 February 2020
Ethics approval and consent to participate
: Ethics approval for the study and for waiver of consent was obtained from the National University of Singapore’s Institutional Review Board (NUS-IRB reference code: B-16-058).
: Not applicable.
: The authors declare that they have no competing interests.