Received: 29 October 2021
Accepted: 27 November 2021
First Online: 6 December 2021
: The data of the present study were collected in the course of common clinical practice, and accordingly, the signed informed consent was obtained from each patient for any surgical and clinical procedure. The study protocol was in accordance with the ethical standards of the institutional research committee and the 1964 Helsinki Declaration and its later amendments. Because it was a retrospective study, formal consent for this study was not required, and no approval of the Institutional Research Committee, King George’s Medical University, U.P. (registration no. ECR/262/Inst/UP/2013/RR-19) was needed.
: Obtained from parents of the patient. It is available if requested.