1. From the Department of Ophthalmology, Harkness Eye Institute, Columbia University, New York, New York;
2. Diacrin Inc, Charlestown, MA; and the
3. From the Department of Ophthalmology, Harkness Eye Institute, Columbia University, New York, New York;3Department of Ophthalmology and Visual Sciences, Lions Eye Institute, University of Louisville, Louisville, Kentucky.
4. Department of Ophthalmology and Visual Sciences, Lions Eye Institute, University of Louisville, Louisville, Kentucky.