Funding for this research was provided by:
Nanyang Technological University (SUG (M4081676.SS0))
Text and Data Mining valid from 2019-08-13
First Online: 13 August 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional review board (NTU-IRB-2016-11-021) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.