1. Do anxiety and depression have a common pathophysiological mechanism?;Boyer;Acta Psychologica Scandinavica,2000
2. Do physicians who diagnose more mental health disorders generate lower health care costs?;Campbell;Journal of Family Practioners,2000
3. Variability in treatment-seeking cocaine abusers: Implications for clinical pharmacotherapy trials;Carroll;NIDA Research Monographs,1997
4. Depression and diabetes;Ciechanowski;Archives of Internal Medicine,2000
5. Pre-therapeutic classification of co-morbidity in chronic disease;Feinstein;Journal of Chronic Disease,1970