1. Philip R. Lee Institute for Health Policy Studies, School of Medicine, University of California, San Francisco
2. Center for Healthcare Value, University of California, San Francisco
3. Department of Anesthesiology and Perioperative Care, University of California, San Francisco
4. Clay Software and Statistics, Ashland, Oregon
5. Department of Ophthalmology, University of California, San Francisco
6. Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston
7. Department of Medicine, University of California, San Francisco