International scientists presented their research during an international workshop at the Clinical Trials Network (CTN) Steering Committee Meeting, March 12, 2014, in Bethesda, Maryland. Greta Zaneti, M.S., University of Pavia, Italy, described her work with Robert Schwartz, M.D., Friends Research Institute, examining clinical, research, and public health models to address problem gambling in order to begin designing a cognitive behavioral gambling intervention in collaboration with the Italian Department for Anti-Drug Policies. Nathalie Gendron, Ph.D., assistant director of the Institute of Neurosciences, Mental Health and Addiction at the Canadian Institutes of Health Research, discussed the new Canadian Research Initiative in Substance Misuse, which uses the CTN model to create teams of university researchers and community-based treatment providers. Fabian Fiestas, Ph.D., Centro Nacional de Salud Pública at the Instituto Nacional de Salud de Peru, reviewed current conditions and suggested future directions for substance abuse treatment in Peru following the recently signed binational agreement between NIDA and Instituto Nacional de Salud de Peru. Clinical Trials Unit Coordinator Rodrigo Marin Navarrete, Ph.D., Instituto Nacional de Psiquiatria Ramón de la Fuente of Mexico, presented results from a multisite randomized clinical trial that assessed motivational enhancement treatment in outpatient addiction care centers in Mexico.