TY - JOUR T1 - Cervical erector spinae versus retrolaminar plane block as an alternative to classical interscalene block JF - Regional Anesthesia & Pain Medicine JO - Reg Anesth Pain Med DO - 10.1136/rapm-2021-102831 SP - rapm-2021-102831 AU - Ban C H Tsui AU - Hesham Elsharkawy Y1 - 2021/05/23 UR - http://rapm.bmj.com/content/early/2021/05/23/rapm-2021-102831.abstract N2 - ER -