J. P.Mezzatesta, D. A.Scott, S. A.Schweitzer, D. E.Selander
Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Jul 1997, 22 (4) 357-362; DOI: 10.1136/rapm-00115550-199722040-00012
Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Nov 1997, 22 (6) 557-561; DOI: 10.1136/rapm-00115550-199722060-00011