Received: 11 May 2019
Accepted: 18 June 2019
First Online: 21 June 2019
Ethics approval and consent to participate
: This study was approved by the Internal Ethics Committee of the Department of Biochemistry and Molecular Biology, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh. All participants were informed about the study and they gave their written consent before inclusion in the study.
: Not applicable.
: The authors declare that they have no competing interests.