[1] Wayne State Univ, Sch Med, Ophthalmol, Detroit, MI USA
[2] Wayne State Univ, Sch Med, Dept Anat Cell Biol, Detroit, MI USA
[3] ARS, USDA, Anim Biosci & Biotechnol Lab, Beltsville, MD USA
[4] Rockefeller Univ, Lab Bacterial Pathogenesis & Immunol, 1230 York Ave, New York, NY 10021 USA