Coulter Dept. of Biomedical Engineering, Georgia Institute of Technology, Emory University, Atlanta, Georgia, United States of America.|Department of Biological Sciences, State University of New York, College of Optometry, New York, New York, United States of America.|Department of Biological Sciences, State University of New York, College of Optometry, New York, New York, United States of America.|Department of Biological Sciences, State University of New York, College of Optometry, New York, New York, United States of America.|Department of Biomedical Engineering, Columbia University, New York, New York, United States of America.|Department of Biological Sciences, State University of New York, College of Optometry, New York, New York, United States of America.|Coulter Dept. of Biomedical Engineering, Georgia Institute of Technology, Emory University, Atlanta, Georgia, United States of America.