Funding for this research was provided by:
Singapore Ministry of National Development and National Research Foundation (L2NICCFP1-2013-3)
Text and Data Mining valid from 2018-05-28
Received: 18 January 2018
Accepted: 9 May 2018
First Online: 28 May 2018
Compliance with Ethical Standards
: The authors declare that they have no competing interests.
: Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the L2 NIC.