Tan, Kit-Aun http://orcid.org/0000-0002-4310-9087
Article History
First Online: 8 January 2018
Compliance with Ethical Standards
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The author declares that there are no conflicts of interest.
: Informed consent was obtained from all individual participants included in the study.