Funding for this research was provided by:
Lee Kong School of Medicine, Nanyang Technological University, Singapore (Start Up Grant)
Article History
Received: 6 February 2018
Accepted: 7 August 2018
First Online: 3 September 2018
Ethics approval and consent to participate
: Not applicable
: 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.