1 Division of Biomedical Informatics, Department of Medicine, University of California San Diego, La Jolla, CA, USA.
2 Viterbi Family Department of Ophthalmology and Shiley Eye Institute, University of California San Diego, La Jolla, CA, USA.
3 Division of Biomedical Informatics, Department of Medicine, University of California San Diego, La Jolla, CA, USA. S1baxter@health.ucsd.edu.
4 Viterbi Family Department of Ophthalmology and Shiley Eye Institute, University of California San Diego, La Jolla, CA, USA. S1baxter@health.ucsd.edu.