1. Kaiser Permanente Southern California, Department of Research & Evaluation, Pasadena.
2. Southern California Permanente Medical Group, Los Angeles.
3. Kaiser Permanente Southern California, Department of Research & Evaluation, Pasadena, and Western University College of Pharmacy, Pomona, California.
4. Regeneron Pharmaceuticals, Tarrytown, New York.
5. Sanofi, Bridgewater, New Jersey.