Funding for this research was provided by:
Mitsui Sumitomo Insurance Welfare Foundation
Text and Data Mining valid from 2019-04-29
Received: 12 September 2018
Accepted: 15 April 2019
First Online: 29 April 2019
Ethics approval and consent to participate
: This study was reviewed and approved by the SingHealth Centralized Institutional Review Board (CIRB reference 2017/2393). Participants were provided the approved patient information sheet, clarified on their queries and recruited after the investigator obtained their informed written consent.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.