Affiliation: | (1) The Graduate Program in Immunology and the Departments of Cell Biology and Internal Medicine, University of Texas Health Science Center at Dallas, 5323 Harry Hines Boulevard, 75235 Dallas, Texas;(2) Present address: Department of Internal Medicine, Royal Victoria Hospital, 687 Pine Avenue West, H3A1A1 Montreal, Quebec, Canada;(3) Present address: Department of Microbiology and Immunology, University of Miami School of Medicine, 33101 Miami, FL |