- Myositis Support Group Formally known as D & P Support Group the Charity provides information and practical advice and research into Dermatomyositis, Polymyositis, Juvenile Dermatomyositis and Inclusion Body Myositis Registered Charity Number 327791 Copyright 2000 MSGUKConsult IT Modified Apr 02 Try our NEW Bulletin Board .......... WHAT ARE DERMATOMYOSITIS AND POLYMYOSITIS Dermatomyositis and ...www.myositis.org.uk