1. Division of Infectious Diseases, Department of Medicine, University of Utah School of Medicine , Salt Lake City, Utah , USA
2. Department of Pathology, University of Utah School of Medicine , Salt Lake City, Utah , USA
3. Department of Pathology and Laboratory Medicine, University of Saskatchewan , Saskatoon, Saskatchewan , Canada
4. Division of Urology, Department of Surgery, University of Utah School of Medicine , Salt Lake City, Utah , USA
5. Department of Medicine, George E. Wahlen Veterans Affairs Medical Center , Salt Lake City, Utah , USA