Institution: | (1) Present address: Department of Microbiology and Immunology, Texas College of Osteopathic Medicine, 76107-2690 Fort Worth, TX, USA;(2) Present address: Department of Pharmacology, University of Michigan, 48104 Ann Arbor, MI, USA;(3) Department of Biochemistry, Michigan State University, 48824 East Lansing, MI, USA |