ONYX: A System for the Semantic Analysis of Clinical Text Lee Christensen author Henk Harkema author Peter Haug author Jeannie Irwin author Wendy Chapman author 2009-06 text Proceedings of the BioNLP 2009 Workshop K Bretonnel Cohen editor Dina Demner-Fushman editor Sophia Ananiadou editor John Pestian editor Jun’ichi Tsujii editor Bonnie Webber editor Association for Computational Linguistics Boulder, Colorado conference publication christensen-etal-2009-onyx https://aclanthology.org/W09-1303/ 2009-06 19 27