Affiliation: | 1. Department of Research & Evaluation, Kaiser Permanente Southern California, Pasadena, CA, USA;2. Kaiser Permanente Center for Effectiveness & Safety Research, Pasadena, CA, USA;3. Institute for Health Research, Kaiser Permanente Colorado, Denver, CO, USA;4. The Center for Health Research, Kaiser Permanente Northwest, Portland, OR, USA;5. The Center for Health Research, Kaiser Permanente Hawaii, Honolulu, HI, USA |