Huynh-Van, Ba
Vuong-Thao, Vy
Huynh-Thi-Thanh, Tuyen
Dang-Xuan, Sinh
Huynh-Van, Tung
Tran-To, Loan
Nguyen-Thi-Thao, Nguyen
Huynh-Bach, Cuc
Nguyen-Viet, Hung
Article History
Received: 7 November 2020
Accepted: 13 December 2021
First Online: 14 January 2022
Declarations
:
: Information about the survey was presented to participants and each was asked for their informed written consent before participating. Informed consent was also obtained from the legally authorized representatives of the illiterate participants and from parents or main caregivers for participants less than 18 years of age. The study was approved by the committee established by Department Science and Technology of Can Tho city under the People Committee of Can Tho city, Vietnam, No. 12/HD-SKHCN dated August 28, 2017. Department Science and Technology of Can Tho city under the People Committee of Can Tho city, Vietnam has a institutional committee to approve the study protocols.
: The authors declare that they have no competing interests.