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Contributors Concept and design: DKJ. Literature research: DKJ, JSG, JR, NK, TS. Clinical studies: DKJ, JSG, JR, NK, TS, PKB, PK. Photographic data: DKJ, JSG, JR, PKB, PK. Manuscript preparation: DKJ, JSG. Manuscript editing: JR, NK, TS, PKB, PK.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests Patent application titled 'Universal Working Sheath for Micro Endoscopic Assisted Surgeries of Lumbar and Lumbosacral Spine' has been submitted to the office of the Controller General of Patents, Designs & Trade Mark, New Delhi, India (application no. 201711041209 A).
Provenance and peer review Not commissioned; externally peer reviewed.
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