Perbandingan Luaran Klinis dan Radiologis Degeneratif Lumbal Canal Stenosis yang Dilakukan Dekompresi Biportal Endoscopic Spine Surgery Discectomy dan tanpa Discectomy = Comparison of Clinical and Radiological Outcomes of Biportal Endoscopic Spine Surgery with Discectomy and without Discectomy in Degenerative Lumbar Canal Stenosis