Que, Lin
Jia, Mao
You, Zhen http://orcid.org/0000-0002-9792-7747
Jiang, Li-cheng
Yang, Chun-guang
Quaresma, Alexandre Afonso d’Oliveira
das Neves, Edgar Manuel Azevedo Agostinho
Article History
Received: 23 August 2021
Accepted: 22 September 2021
First Online: 28 September 2021
Declarations
:
: Ethical clearance for conducting the study was granted by the Ethical Committee of São Tomé and Príncipe. Written consent was secured from the corresponding author and the parents or legal guardians of each child who participated in the study. After a brief explanation of the purpose of the study, verbal consent was obtained from the study participants. Confidentiality was assured by excluding personal identifiers and the right to withdraw at any stage of the study.
: Not Applicable.
: The authors declare that there are no competing interests.