Handbook on obsessive-compulsive and related disorders [electronic resource] / edited by Katharine A. Phillips, M.D., Professor of Psychiatry and Human Behavior, Alpert Medical School of Brown University, Senior Research Scientist and Director, Body Dysmorphic Disorder Program, Rhode Island Hospital, Providence, Rhode Island, Dan J. Stein, M.D., Ph. D., Professor and Chair, Department of Psychiatry, University of Cape Town, Cape Town, South Africa.