1. The authors are all with Pfizer Inc. in New York City. Newell McElwee () is vice president of U.S. outcomes research in the U.S. Medical Group. S. Yin Ho is senior director of health strategy in the U.S. Planning and Business Development Group. Kimberly McGuigan is director/team leader of the Evidence-based Medicine Center of Excellence, U.S. Outcomes Research, in the U.S. Medical Group. Mark Horn is medical director of the Government Relations Group.