Funding for this research was provided by:
Research Grants Council, University Grants Committee (14111816, 14110714)
CUHK Direct Grant (4054302)
Article History
Received: 18 March 2018
Accepted: 13 September 2018
First Online: 22 September 2018
Compliance with ethical standards
:
: All authors declare that they do not have anything to disclose regarding funding or conflict of interest with respect to this manuscript. This article is not an official U.S. Food and Drug Administration guidance or policy statement. No official support or endorsement by U.S Food and Drug Administration is intended or should be inferred.