mental and substance use disorders. joining us in our panel today are dr. h. wesley clark, director, center for substance abuse treatment, substance abuse and mental health services administrationu.s. department of health and human services, rockville, maryland; dr. thomas mclellan, director, center for substance abuse solutions, philadelphia, pennsylvania; dr. alexandre laudet, director, center for the study of addictions and recovery, national development and research institutes, incorporated, new york, new york; dr. candace peterson, associate scientist, evaluation shared service, university of wisconsin population health institute, madison, wisconsin. dr. clark, what does research to practice mean and what does it mean for a methodology or a practice to be evidence-based? research to practice is a concept that captures the evolvement in the research community with regard to various aspects of, in this case, substance abuse or mental health care in an effort to increase the ability to positively affect the individual who's affected by it. so, evidence-based, then, is mobilizing administrative, clinical, and research information to enhance the quality of care and the effectiv