Differences in the use of psychiatric outpatient services between the United States and Ontario
New England Journal of Medicine
http://www.nejm.org/doi/full/10.1056/NEJM199702203360806#Top
The Ellipsis of Prognosis in Modern Medical Thought
Social Science and Medicine
http://christakis.med.harvard.edu/pdf/publications/articles/027.pdf
Prevalence and demographic correlates of symptoms of last year dependence on alcohol, nicotine, marijuana and cocaine in the U.S. population
Drug and Alcohol Dependence
http://www.sciencedirect.com/science/article/pii/S0376871696013154
Statistical methods for profiling providers of medical care: Issues and applications
Journal of the American Statistical Association
http://www.tandfonline.com/doi/abs/10.1080/01621459.1997.10474036#preview