Investigating Public Health Surveillance using Twitter Antonio Jimeno Yepes author Andrew MacKinlay author Bo Han author 2015-07 text Proceedings of BioNLP 15 Kevin Bretonnel Cohen editor Dina Demner-Fushman editor Sophia Ananiadou editor Jun-ichi Tsujii editor Association for Computational Linguistics Beijing, China conference publication jimeno-yepes-etal-2015-investigating 10.18653/v1/W15-3821 https://aclanthology.org/W15-3821/ 2015-07 164 170