항상 친절하고 빠른 회신 감사드립니다. 1. How i do it: biportal endoscopic thoracic decompression for ossification of the ligamentum flavum. Kang MS, Chung HJ, You KH, Park HJ. Acta Neurochir (Wien). 2022 Jan;164(1):43-47. doi: 10.1007/s00701-021-05031-7. Epub 2021 Oct 26. PMID: 34697694 2. Percutaneous Endoscopic Posterior Decompression for Therapy of Spinal Cord Compression Due to Ossification of the Ligamentum Flavum: A Long-Term Follow-up. Zheng C, Liao Z, Chen HZ. World Neurosurg. 2021 Dec;156:e249-e253. doi: 10.1016/j.wneu.2021.09.044. Epub 2021 Sep 17. PMID: 34537406 3. Percutaneous Endoscopic Thoracic Decompression for Thoracic Spinal Stenosis Under Local Anesthesia. Cheng XK, Chen B. World Neurosurg. 2020 Jul;139:488-494. doi: 10.1016/j.wneu.2020.04.199. Epub 2020 May 4. PMID: 32376381 4. Posterior Percutaneous Endoscopic Technique Through Bilateral Translaminar Osseous Channels for Thoracic Spinal Stenosis Caused by Ossification of the Ligamentum Flavum Combined with Disk Herniation at the T10-11 Level: A Technical Note. Liu L, Li Q, Ao J, Du Q, Xin ZJ, Liao WB. World Neurosurg. 2020 Jan;133:135-141. doi: 10.1016/j.wneu.2019.08.215. Epub 2019 Sep 7. PMID: 31505277 5. The Effect of Using Visual Trepan to Treat Single-Segment Ossification of Ligamentum Flavum Under the Endoscope. Wu W, Diao W, Yang S, Guo Y, Yan M, Luo F. World Neurosurg. 2019 Nov;131:e550-e556. doi: 10.1016/j.wneu.2019.07.223. Epub 2019 Aug 6. PMID: 31398521