1. Departments of Ophthalmology and Microbiology; The University of Oklahoma Health Sciences Center; Robert M. Bird Library, Rm. 121, P.O. Box 26901 Oklahoma City OK 73190
2. Department of Microbiology and Immunology; The University of Oklahoma Health Sciences Center, Stanton L. Young Biomedical Research Center; Rm. 356, P.O. Box 26901 Oklahoma City OK 73190
3. Division of Infectious Diseases, Departments of Internal Medicine and of Microbiology and Molecular Genetics; The University of Texas-Houston Health Sciences Center; 6431 Fannin, JFB 1.728 Houston TX 77030