1. Cardiovascular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California
2. Stanford University School of Medicine, Stanford, California; Department of Biostatistics, Keck School of Medicine, University of Southern California, Los Angeles, California
3. Department of Product Development, Keck School of Medicine, University of Southern California, Los Angeles, California
4. Clinical Laboratory, Keck School of Medicine, University of Southern California, Los Angeles, California
5. Aviir Diagnostic Laboratories, Irvine, California; Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, California