1. American College of Physicians, Philadelphia, Pennsylvania (A.Q., I.E-I.)
2. Stanford Health Policy, Stanford University, Stanford, California (D.K.O.)
3. Hassanah Consulting, Seattle, Washington (J.T.)
4. A-Cross Medicine Reviews, Colorado Springs, Colorado (J.T.J.)
5. Minneapolis VA Center for Care Delivery and Outcomes Research, Minneapolis, Minnesota (T.J.W.).