Comparative study to assess the efficacy of ropivacaine (0.25%) with magnesium sulfate versus ropivacaine (0.25%) with dexmedetomidine in USG-guided pectoral nerve block type I and II in unilateral breast surgery. - Yadav, Anmol; Kumar, Roopesh; Sethi, Chavi (Asian Journal of Medical Sciences, 2026)