Correspondence: Rohit Aggarwal UPMC Arthritis and Autoimmunity Clinic, Department of Medicine, Rheumatology, University of Pittsburgh, Falk Medical Building, 3601 Fifth Avenue, Suite 2B, Pittsburgh, PA 15213, USA Tel +1 412 648 9782 Fax +1 412 383 8864 Email [email protected] Abstract: The idiopathic inflammatory myopathies are a heterogeneous group of diseases that include dermatomyositis (DM...