5Kallio H,Snall EV T,Kero MP,et al.A comparison of in-trathecal plain solutions containing ropivacaine20or15mg versus bupivacaine10mg[].Anesthesia and Analgesia.2004
6Gantier PE,Dekock M,Van steenberge H,et al.Intrathecal ropivacaine for ambulatory surgery[].Anesthesiology.1999