i. Funding: No funding was received in any form by any of the authors
iii. Ethics approval: Ethics committee approval received from Institutional review board(Regn Number ECR/846/Inst/WB/2016/RR-19 : EC-CT-2020-138)
iv. Consent to participate: Written consent obtained from the patient for publication. The identity of the patient will not be disclosed in any way
v. Consent for publication: The authors hereby give you full permission, transfer, assign, or otherwise convey all copyright ownership, including any and all rights incidental there to, exclusively to the journal, in the event that such work is published by the journal
vi. Availability of data and material: Any supplementary data/ information will be available from the corresponding author on reasonable request
vii. Code availability: not applicable
viii. Authors' contributions
Dr Debdulal Chakraborty: Concept, Data collection, literature search, manuscript writing and review
Dr Dipankar Das: literature search, critical analysis of manuscript
Dr Sabiha Mashuda Khanam: literature search, Data collection
Competing interests: None
Receipt of grant : Nil
Previous publication/ presentation : Nil