Article History
First Online: 7 January 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were conducted in accordance with the ethical standards of the research committee at University of Medicine and Pharmacy at Ho Chi Minh City and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. Informed consent was obtained individually from all participants included in the study.