1. Department of Medicine, Section of Arthritis and Connective Tissue Diseases, Northwestern University, Chicago, IL 60611 and Veterans Administration Lakeside Medical Center, Chicago, IL 60611
2. Department of Pathology, University of Michigan, Ann Arbor, Ml 48109.
3. Department of Surgery, Loyola University Medical Center, Maywood, IL 60153.
4. Departments of Pathology and Ophthalmology, University of Michigan, Ann Arbor, MI 48109.
5. Department of Medicine, Pulmonary Division, University of Michigan, Ann Arbor, Ml 48109.