Singh, Dharmendra http://orcid.org/0000-0001-8962-890X
Mandal, Avik
Article History
Received: 15 May 2020
Accepted: 17 August 2020
First Online: 27 August 2020
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: The local Ethics Committee of Institute of Post Graduate Medical Education and Research, Kolkata waived ethical approval in view of the retrospective nature of the study and all the procedures being performed were part of the routine care.