Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Nov 1997, 22 (6) 500-510; DOI: 10.1136/rapm-00115550-199722060-00002
Soledad M.Cepeda, CarlosUribe, JairoBetancourt, JoseRugeles, Daniel B.Carr
Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control May 1997, 22 (3) 233-238; DOI: 10.1136/rapm-00115550-199722030-00007