@misc{misce19eb415,
title   = {Epidural ketamine versus epidural clonidine as therapeutics for refractory chronic low back pain},
author = {Lauretti, Gabriela Rocha and Rodrigues, Abigail Moura and Reis, Marlene Paulino dos},
year = {2001},
booktitle   = {Annual Meeting of American Societies of Regional Anesthesia}
}