He and his research team are funded by NIH and have been working together in Vietnam since 2001. His team currently has five active NIH grants being implemented in Vietnam and he serves as the U.S. Site Director for sites in Vietnam for the VECD (Vanderbilt-Emory-Cornell-Duke Consortium) Fogarty Global Health Fellowships. His main research interests are assessment and factors predictive of the efficacy of child psychotherapy under non-research conditions; development of psychological interventions for non-Western populations; and comorbidity in child psychopathology.