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Reply to Dr Johnston.
Petrar SD, Seltenrich ME, Head SJ, Schwarz SK. Petrar SD, et al. Among authors: seltenrich me. Reg Anesth Pain Med. 2015 Jul-Aug;40(4):394-5. doi: 10.1097/AAP.0000000000000271. Reg Anesth Pain Med. 2015. PMID: 26079363 No abstract available.