RT Journal A1 Shilling, Ashley T1 The Continued Search for the Perfect AnalgesicCommentary on an article by Anshu Singh, MD, et al.: “Ultrasound-Guided Interscalene Block Anesthesia for Shoulder Arthroscopy. A Prospective Study of 1319 Patients” JF The Journal of Bone & Joint Surgery JO The Journal of Bone & Joint Surgery YR 2012 FD November 21 VO 94 IS 22 SP e170 1 OP 2 DO 10.2106/JBJS.L.01066 UL http://dx.doi.org/10.2106/JBJS.L.01066 AB