Trained in cognitive behavioral therapy methods (CBT), Dr. Muroff is a licensed social worker and trained psychologist with extensive clinical experience. Her research on mental health interventions has established the efficacy of group treatment for hoarding disorder. Patty Underwood, MSW, is a licensed independent clinical social worker in Massachusetts and a highly experienced clinician at Riverside Community Care, a large community-based mental health agency. She is a part-time lecturer at Boston University School of Social Work (BUSSW), teaching courses in clinical practice. She also serves on the Dean's Advisory Board at the Boston University School of Social Work. Gail Steketee, PhD, is Dean and Professor of the Boston University School of Social Work. Her research has focused on understanding the causes and consequences of obsessive-compulsive