1 Francis I Proctor Foundation, University of California, San Francisco, CA 94158, USA; Department of Ophthalmology, University of California, San Francisco, CA 94158, USA; Department of Epidemiology and Biostatistics, University of California, San Francisco, CA 94158, USA. Electronic address: catherine.oldenburg@ucsf.edu.
2 Francis I Proctor Foundation, University of California, San Francisco, CA 94158, USA; Department of Ophthalmology, University of California, San Francisco, CA 94158, USA.