Hung, P. D.
Su, N. T.
Article History
Received: 8 October 2020
Revised: 16 January 2021
Accepted: 22 January 2021
First Online: 30 June 2021
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of interests.</i> The authors declare no conflict of interest neither in financial nor in any other area.<i>Statement of compliance with standards of research involving humans as subjects.</i> 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. Informed consent was obtained from all individual participants involved in the study.
: The authors declare no conflict of interest neither in financial nor in any other area.