Comparison of the Combination of Interscalene Block and Superficial Cervical Block Anaesthesia with Interscalene Block Anaesthesia in Shoulder Surgery Operations. - Sengel A; Secilmis S; Buyukfirat E; Altay N; Yazar V; Bilsel MB (Journal of the College of Physicians and Surgeons--Pakistan : JCPSP, 2025)