Classification of CT pulmonary angiography reports by presence, chronicity, and location of pulmonary embolism with natural language processing. - Sheng Yu 002; Kanako K. Kumamaru; Elizabeth George; Ruth M. Dunne; Arash Bedayat; Matey Neykov; Andetta R. Hunsaker; Karin E. Dill; Tianxi Cai; Frank J. Rybicki (J. Biomed. Informatics, 2014)