1. Kaiser Permanente Washington Health Research Institute, Seattle, Washington (L.D.)
2. Kaiser Permanente Center for Health Research, Portland, Oregon (M.M., A.B., C.R.E., M.C.L., C.M., D.H.S., W.M.V.)
3. Kaiser Permanente Center for Health Research, Portland, Oregon, and Montana State University College of Nursing, Missoula, Montana (L.B.)
4. Oregon Health & Science University School of Medicine, Portland, Oregon (R.A.D.)
5. Duke University School of Medicine, Durham, North Carolina (F.J.K.)
6. Georgia State University School of Public Health and Kaiser Permanente Center for Clinical and Outcomes Research, Atlanta, Georgia (A.O.)
7. The Queen's Medical Center, Honolulu, Hawaii (C.M.T.).