Published on in Vol 15, No 9 (2013): September
1 Harborview Medical Center, University of Washington School of Medicine, Seattle, WA, United States
2 Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
3 College of Nursing and Health Sciences, University of Massachusetts, Boston, MA, United States
4 Group Health Research Institute, Group Health Cooperative, Seattle, WA, United States
5 Geisinger Health System, Danville, PA, United States