Minimally invasive biportal endoscopic spinal surgery for central canal stenosis in low-grade degenerative lumbar spondylolisthesis: clinical outcomes and implications: a retrospective observational study. - Liawrungrueang, Wongthawat; Lee, Ho-Jin; Kim, Sang Bum; Lee, Sang Hyeok; Lee, Sang Shin; Kim, Ju-Eun (Asian Spine Journal, 2025)