1. Department of Laboratory Medicine and Pathology , University of Washington , Seattle , WA , USA
2. Rheumatology Division, Department of Medicine , University of Washington , Seattle , WA , USA
3. Department of Pathology , University of Utah School of Medicine , Salt Lake City , UT , USA
4. Department of Biostatistics , College of American Pathologists , Northfield , IL , USA
5. The Department of Pathology, Anatomy, and Laboratory Medicine , West Virginia University , Morgantown , WV , USA
6. Immunopathology Laboratory, Robert Tomsich Pathology and Laboratory Medicine Institute, Cleveland Clinic , Cleveland , OH , USA
7. Department of Laboratory Medicine and Pathology , Mayo Clinic , Rochester , MN , USA