1. Rush University Medical Center, Chicago, Illinois (K.J.P.)
2. Weill Cornell Medicine, New York, New York (D.P.C.)
3. University of Michigan Medical School and Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan (P.K.P., S.S., V.C.)
4. Health Research & Educational Trust, American Hospital Association, Chicago, Illinois (S.L., A.J.R., L.H.)