@InProceedings{xu-EtAl:2009:BioNLP,
  author    = {Xu, Rong  and  Morgan, Alexander A.  and  Das, Amar  and  Garber, Alan},
  title     = {Investigation of Unsupervised Pattern Learning Techniques for Bootstrap Construction of a Medical Treatment Lexicon},
  booktitle = {Proceedings of the BioNLP 2009 Workshop},
  month     = {June},
  year      = {2009},
  address   = {Boulder, Colorado},
  publisher = {Association for Computational Linguistics},
  pages     = {63--70},
  url       = {http://www.aclweb.org/anthology/W/W09/W09-1308}
}