Funding for this research was provided by:
Ministry of Education - Singapore (MOE2014-T2-2-043)
National Medical Research Council (NMRC-OF-IRG-0003-2016)
National Healthcare Group Small Innovative Grant (13018)
Text and Data Mining valid from 2018-03-13
Received: 22 November 2017
Accepted: 1 March 2018
First Online: 13 March 2018
Compliance with ethical standards
: The authors declare that they have no competing interests.
: This study was in agreement with the Declaration of Helsinki and approved by the Institutional Review Board at the Tan Tock Seng Hospital (TTSH). Informed consent was obtained from each patient.