1. From the Department of Pathology, St Joseph Mercy Hospital, Ann Arbor, Mich (Dr Valenstein); the Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at University of California, Los Angeles (Dr Wagar); Preanalytical Systems, BD Diagnostics, Franklin Lakes, NJ (Dr Stankovic); the Department of Biostatistics, College of American Pathologists, Northfield, Ill (Dr Walsh);