1. VA Palo Alto Health Care System, US Department of Veterans Affairs, Menlo Park, CA, USA
2. Stanford Center for Population Health Sciences, Stanford University School of Medicine, Stanford, CA, USA
3. Department of Epidemiology and Population Health, Stanford University, Stanford, CA, USA
4. Public Health Program, Santa Clara University, Santa Clara, CA, USA
5. VA St Louis Healthcare System, US Department of Veterans Affairs, St Louis, MO, USA
6. Harvard FXB Center for Health and Human Rights, Harvard TH Chan School of Public Health, Boston, MA, USA
7. Department of Radiology, Stanford University, Stanford, CA, USA