1. From the Medical Sciences Institute, BloodCenter of Wisconsin, part of Versiti, Milwaukee (Dr Karafin); the Department of Pathology, Medical College of Wisconsin, Milwaukee (Dr Karafin); the Department of Internal Medicine, University of Iowa, Iowa City (Dr Glisch); the Department of Biostatistics, College of American Pathologists, Northfield, Illinois (Ms Souers); the Department of Pathology, Un