[1] Kaiser Permanente Northwest Ctr Hlth Res, Portland, OR USA
[2] Kaiser Permanente Ctr Effectiveness & Safety Res, Pasadena, CA USA
[3] Kaiser Permanente Colorado Inst Hlth Res, Denver, CO USA
[4] Kaiser Permanente Southern Calif Dept Res & Evalu, Pasadena, CA USA
[5] Kaiser Permanente Hawaii Ctr Hlth Res, Honolulu, HI USA