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Greg Crosby

Greg Crosby, MA, LPC, FAGPA, is a practicing therapist and college and graduate school instructor. He started the first adult ADHD group at Kaiser NW Region in 1994, and has been working with the Oregon Attorney Assistance Program providing ADHD workshops since 2013. Crosby is a certified group psychotherapist and fellow in group psychotherapy. He teaches adult ADHD classes at Portland State University and Marylhurst University. Crosby offers workshops for professionals on and has a private practice in adult ADHD.Tonya K. Lippert, PhD, MSSW, LCSW, works for Kaiser Permanente's mental health and social work departments, doing skills groups for the former and child abuse evaluations for the latter. One of her favorite skills groups to run is the adult ADHD group. This is her first published book, though she's had several research articles published and writes children's books during her free time.

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