Longitudinal analysis of pain in patients with metastatic prostate cancer using natural language processing of medical record text. - Norris H. Heintzelman; Robert J. Taylor; Lone Simonsen; Roger Lustig; Doug Anderko; Jennifer A. Haythornthwaite; Lois C. Childs; George Steven Bova (J. Am. Medical Informatics Assoc., 2013)