Pain relief after Arthroscopic Knee Surgery: A comparison of intra-articular ropivacaine, fentanyl, and dexmedetomidine: A prospective, double-blinded, randomized controlled study oleh Mohammed Babrak Manuar, Saikat Majumdar, Anjan Das, Bimal Kumar Hajra, Soumyadip Dutta, Dipankar Mukherjee, Tapobrata Mitra, Ratul Kundu