Gravity-Based vs. Pump-Assisted Irrigation in Unilateral Biportal Endoscopic Decompression for Lumbar Spinal Stenosis: Effects on Operative Efficiency, Clinical Outcomes, and Complications - Uğur Özdemir; Abdülhalim Akar; Muhammed Fatih Serttaş; Ali Murat Başak; Tunahan Aka (Medicina, 2026)