Funding for this research was provided by:
Singapore Cancer Society (R-177-000-049-592)
Text and Data Mining valid from 2020-01-31
Received: 23 June 2019
Accepted: 14 January 2020
First Online: 31 January 2020
Ethics approval and consent to participate
: The study received ethics approval from the National Healthcare Group Domain Specific Review Board (Reference: 2015/00003), and written informed consent was obtained from all participants.
: Not applicable.
: The authors declare they have no competing interests.