Article History
Received: 30 July 2021
Accepted: 13 December 2021
First Online: 6 January 2022
Competing interests
: The authors declare no competing interests.
: The study was granted exemption from requiring ethics approval. The exemption was provided by the University of Social Sciences and Humanities, Vietnam National University, Hanoi. The exemption was provided on the basis that this research uses non-sensitive, completely anonymous interview procedures; the participants are not defined as “vulnerable”, and participation will not induce undue psychological stress or anxiety.
: Verbal informed consent was obtained from all participants and/or their legal guardians prior to the interview, and the participants have consented to the submission of the case report to the journal.