Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Apr 1987, 12 (2) 80-83; DOI: 10.1136/rapm-00115550-198712020-00004
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Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Jan 1993, 18 (1) 18-23; DOI: 10.1136/rapm-00115550-199318010-00004