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Reina MA, de Leon-Casasola OA, Lopez A, De Andres J, Martin S, Mora M.Reina MA, et al.Reg Anesth Pain Med. 2000 Jul-Aug;25(4):393-402. doi: 10.1053/rapm.2000.7622.Reg Anesth Pain Med. 2000.PMID: 10925937