Institutions:
  1. Kaiser Permanente Washington Health Research Institute, 1730 Minor Avenue Suite 1600, Seattle, WA 98101
  2. University of Washington Department of Epidemiology, UW Box #351619, Seattle, WA 98195
  3. Kaiser Permanente Northern California, Division of Research, 2000 Broadway, Oakland, CA 94612
  4. Chapman University School of Pharmacy, 9401 Jeronimo Road, Irvine, CA 92618
  5. University of Washington Department of Obstetrics & Gynecology, 1959 NE Pacific St. Box 356460, Seattle, WA 98195
  6. Kaiser Permanente Southern California Department of Research and Evaluation, 100 S Los Robles Avenue 2nd Floor, Pasadena, CA 91101
  7. University of Washington Department of Biostatistics, Box 357232 Seattle, WA 98195
Corresponding author: Dr. Sascha Dublin, 1730 Minor Avenue, Suite 1600, Seattle, WA 98101; phone: 206-287-2870; email: Sascha.Dublin@kp.org.
Word count for abstract: 250
Word count for manuscript: 3091