1. American College of Physicians, Philadelphia, Pennsylvania (A.Q., K.C., S.T.)
2. Uniformed Services University, Bethesda, Maryland (C.A.M.)
3. Yale School of Medicine, New Haven, Connecticut (R.M.M.)
4. A-Cross Medicine Reviews, Colorado Springs, Colorado (J.T.C.)
5. Huntington Hospital, Huntington, New York (N.F.).