1. The Permanente Medical Group and Kaiser Permanente Northern California, Oakland, and Kaiser Permanente Sacramento Medical Center, Sacramento, California (D.R.V.)
2. The Permanente Medical Group, Kaiser Permanente Northern California, and Kaiser Permanente Oakland Medical Center, Oakland, California (D.G.M.)
3. The Permanente Medical Group, Oakland, and Kaiser Permanente South San Francisco Medical Center, South San Francisco, California (U.K.C.)
4. Kaiser Permanente Northern California, Oakland, California (J.H., A.S.R., M.E.R.)
5. The Permanente Medical Group, Oakland, and Kaiser Permanente Santa Clara Medical Center, Sacramento, California (J.S.L.)
6. The Permanente Medical Group, Oakland, and Kaiser Permanente San Leandro Medical Center, Sacramento, California (M.V.K.)
7. Scripps Health, San Diego, California (D.H.W.)
8. The Permanente Medical Group and Kaiser Permanente Oakland Medical Center, Oakland, California (D.R.S., C.K.Y.)
9. Kaiser Permanente Los Angeles Medical Center, Los Angeles, California (T.S.P.)
10. The Permanente Medical Group, Oakland, and Kaiser Permanente San Francisco Medical Center, San Francisco, California (I.D.M.)
11. The Permanente Medical Group, Oakland, and Kaiser Permanente South Sacramento Medical Center, Sacramento, California (A.R.E.)
12. University of Michigan Medical School, Ann Arbor, Michigan (H.R.I.)
13. University of Cincinnati College of Medicine, Cincinnati, Ohio (R.V.)
14. University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania (D.M.Y.)
15. The Permanente Medical Group and Kaiser Permanente Northern California, Oakland, and Kaiser Permanente San Rafael Medical Center, San Rafael, California (D.W.B.)