Chew-Hung Lee Jin-Cheon Na Christopher S. G. Khoo Towards Ontology Enrichment with Treatment Relations Extracted from Medical Abstracts. 419-428 2006 conf/icadl/2006 ICADL http://dx.doi.org/10.1007/11931584_45 db/conf/icadl/icadl2006.html#LeeNK06