Received: 28 November 2019
Accepted: 28 January 2020
First Online: 21 February 2020
Ethics approval and consent to participate
: Ethical approval for this study was obtained from the Bangladesh University of Health Sciences (Memo: BUHS/BIO/EA/17/90, dated 12-17-2017). Collected data did not contain any personal information on participating students. Written consent was obtained from each participant.
: Not applicable as no recognisable personal data is disclosed.
: The authors declare that they have no competing interests.