Can J Surg 2021;64(2):E241-E242 | PDF
Vinod Kumar Gupta, MB, MD
Affiliations: From the Migraine-Headache Institute, New Delhi, India.
Competing interests: None declared.
Content licence: This is an Open Access article distributed in accordance with the terms of the Creative Commons Attribution (CC BY-NC-ND 4.0) licence, which permits use, distribution and reproduction in any medium, provided that the original publication is properly cited, the use is noncommercial (i.e., research or educational use), and no modifications or adaptations are made. See: https://creativecommons.org/licenses/by-nc-nd/4.0/
Correspondence to: Vinod Kumar Gupta; email@example.com