1. Francis I. Proctor Foundation, University of California San Francisco, San Francisco, California, United States
2. Wilmer Eye Institute, Johns Hopkins University, Baltimore, Maryland, United States
3. Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pennsylvania, United States
4. Department of Oral Medicine, University of California, San Francisco, San Francisco, California, United States
5. Department of Ophthalmology, University of California San Francisco, San Francisco, California, United States