1. American College of Physicians, Philadelphia, Pennsylvania (A.Q., S.T.)
2. Hospital for Special Surgery, New York, New York (C.H.M.)
3. A-Cross Medicine Reviews, Colorado Springs, Colorado (J.T.C.)
4. UC Davis Health, Sacramento, California (S.T.M.)
5. Cedars-Sinai Medical Care Foundation, Beverly Hills, California (C.L.G.)
6. Huntington Hospital, Huntington, New York (N.F.).