Luke's Medical Center, Chicago, Illinois. He also holds an academic teaching post at the University of Illinois College of Medicine. Dr. Siegel focuses his practice on the orthopaedic management of neuromuscular disease. He has lectured both nationally and internationally on the subject of muscular dystrophy and is a national vice-president and medical consultant for the Muscular Dystrophy Association of America. Dr. Siegel codirects two MDA clinics in the Chicago area and is currently involved in both clinical and laboratory research in this field. He is the author of over 100 scientific articles, numerous pamphlets, and two textbooks on the subject of muscle disease. His most recent books are All About Muscle--A User's Guide, All About Bone: A User's Guide and Muscular Dystrophy in Children: A Guide for Families.