TY - RPRT TI - A temporal constraint structure for extracting temporal information from clinical narrative. AU - Li Zhou AU - Genevieve B Melton AU - Simon Parsons AU - George Hripcsak PY - 2005 DO - 10.1016/j.jbi.2005.07.002 UR - https://pubmed.ncbi.nlm.nih.gov/16169282/ ID - 16169282 ER -