Luong, Hai Thanh
Article History
First Online: 14 April 2020
Compliance with ethical standards
:
: The author declares no potential conflicts of interest. This article constitutes one part of my doctoral thesis. It has not been published—nor is it under review for publication—elsewhere.
: 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.