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2: Nix CM, Margarido CB, Awad IT, Avila A, Cheung JJ, Dubrowski A, McCartney CJ. A scoping review of the evidence for teaching ultrasound-guided regional anesthesia. Reg Anesth Pain Med. 2013; 38: 471-80.  

3: Webster F, Bremner S, McCartney CJ. Patient experiences as knowledge for the evidence base: a qualitative approach to understanding patient experiences regarding the use of regional anesthesia for hip and knee arthroplasty. Reg Anesth Pain Med. 2011; 36: 461-5.  

4: McNaught A, Shastri U, Carmichael N, Awad IT, Columb M, Cheung J, Holtby RM, McCartney CJ. Ultrasound reduces the minimum effective local anaesthetic volume compared with peripheral nerve stimulation for interscalene block. Br J Anaesth. 2011; 106: 124-30.  

5: McCartney CJ, Lin L, Shastri U. Evidence basis for the use of ultrasound for upper-extremity blocks. Reg Anesth Pain Med. 2010; 35(2 Suppl): S10-5.