1. Baylor College of Medicine, Houston, TX (X.J., W.S., R.C.H., V.N., C.M.B.).
2. Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX (V.N.).
3. Johns Hopkins University, Baltimore, MD (K.M., E.S.).
4. University of Minnesota, Minneapolis (A.R.F.).
5. University of North Carolina at Chapel Hill (G.H., D.J.C.).
6. Brigham and Women’s Hospital, Boston, MA (S.D.S., A.S.).
7. University of Texas Health Science Center at Houston (E.B.).
8. University of Texas–Southwestern Medical Center, Dallas (J.A.d.L.).