Robert Youdin, PhD, MSW, is Visiting Research Collaborator in the Department of Molecular Biology at Princeton University. A private practitioner for the past 36 years in Princeton, New Jersey, Dr. Youdin has specialized in the treatments of psychotropic substance abuse, co-occurring mood, and anxiety disorders, and he has a sub-specialty in gerontology. For 20 years, Dr. Youdin was Adjunct Associate Professor in the Graduate School of Social Service at Fordham University. He was also a Project Director for a Gero Innovations Grant for the Master's Advanced Curriculum Project funded by the John A. Hartford Foundation and Council on Social Work Education. Dr. Youdin was a participant in the Curriculum Development Institute (Gero-Ed) sponsored by John A. Hartford Foundation and Council on Social Work Education. He is a former Assistant Research Scientist of the Biometrics Unit of the New York State Psychiatric Institute in New York City. In 1977, he was elected as member of Sigma Xi (the Scientific Research Society of North America, Downstate Medical Center Chapter). In addition, he has appeared on numerous public service radio programs discussing various addictions.