Affiliation: | Veterans Affairs Medical Center, 601 Highway 6 West, Iowa City, Iowa 52246,1. Department of Pathology, The University of Iowa Roy J. and Lucille A. Carver College of Medicine, Iowa City, Iowa 52242,2. Department of Microbiology, The University of Iowa Roy J. and Lucille A. Carver College of Medicine, Iowa City, Iowa 52244,3. Department of Otolaryngology, The University of Iowa Roy J. and Lucille A. Carver College of Medicine, Iowa City, Iowa 522444. |