Funding for this research was provided by:
National Cancer Institute (R01 CA144034, T32CA186873, UM1 CA182876)
National Medical Research Council (NMRC/CSA/0055/2013)
Received: 28 September 2018
Accepted: 27 March 2019
First Online: 17 April 2019
Ethics approval and consent to participate
: All study participants provided written informed consent. The institutional review boards of the National University of Singapore and the University of Pittsburgh approved the study.
: Not applicable.
: The authors declare that they have no competing interests.
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