1. 1 Immunopathology Laboratory, Robert J. Tomsich Pathology & Laboratory Medicine Department, Diagnostics Institute, Cleveland Clinic, Cleveland, Ohio (Kadkhoda)
2. 2 Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, Ohio (Kadkhoda)
3. 3 Laboratory Improvement Programs, Surveys, College of American Pathologists, Northfield, Illinois (Souers, Calvey)