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Authors
Pham, N. S.
Tran, H. L.
Nguyen, T. H. T.
Nguyen, V. H.
Hoang, H.
Tung, Q. N.
Phi, Q. T.
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Article History
Received: 16 September 2020
Revised: 4 January 2021
Accepted: 18 January 2021
First Online: 30 August 2021
COMPLIANCE WITH ETHICAL STANDARDS
: Conflict of interest . The authors declare that they have no conflict of interest.
: Statement of compliance with standards of research involving humans as subjects . 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.
