1. Institute for Public Health and Medicine, Center for Health Services and Outcomes Research, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
2. Institute for Public Health and Medicine, Center for Health Information Partnerships, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
3. Division of General Internal Medicine and Geriatrics, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
4. Pritzker School of Law, Northwestern University, Chicago, Illinois, USA
5. Kellogg School of Management, Northwestern University, Chicago, Illinois, USA
6. Department of Ophthalmology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
7. U.S. Department of Veterans Affairs, Health Services Research and Development, Hines, Illinois, USA