1. Ocular Virology Laboratory, Department of Ophthalmology & Visual Sciences, University of Illinois at Chicago, 1855 West Taylor Street, M/C 648, Chicago, IL 60612, USA
2. Department of Microbiology and Immunology, College of Medicine, E-704 Medical Sciences Building, University of Illinois at Chicago, M/C 790, 835 South Wolcott Avenue, Chicago, IL 60612, USA