Received: 1 April 2019
Accepted: 15 June 2020
First Online: 24 June 2020
Ethics approval and consent to participate
: The study protocol was approved by the ethical review committee at the department of psychiatry, BSMMU. All investigations were conducted according to the principles expressed in the Declaration of Helsinki. The study participants were well informed about the objective of the study and written consent was taken from each of them or their caregivers.
: Not applicable.
: The authors declare that they have no competing interests.