Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Sep 1993, 18 (5) 315-317; DOI: 10.1136/rapm-00115550-199318050-00011
Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Oct 1986, 11 (4) 182-185; DOI: 10.1136/rapm-00115550-198611040-00009