Article History
Received: 22 November 2017
Accepted: 6 February 2018
First Online: 13 February 2018
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board of St. Paul’s Hospital Millennium Medical College, with informed consent waived based on study design.
: 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.