1. Christiana Care Health System, Newark, DE (Z.Z.)
2. Mid-America Heart Institute/University of Missouri-Kansas City (P.J., J.A.S.)
3. MedStar Washington Hospital Center (W.S.W.)
4. New York Veterans Affairs Medical Center and New York University (S.S.)
5. Stanford University, CA (D.J.M.)
6. McMaster University, Hamilton, ON, Canada (K.T.)
7. Cooperative Studies Program Coordinating Center, Veterans Affairs Connecticut Healthcare System, West Haven (P.H.)
8. London Health Sciences Centre, ON, Canada (W.K.)
9. Cedars-Sinai Medical Center, Los Angeles, CA (D.B.)
10. Veterans Affairs New England Healthcare System, Massachusetts Veterans Epidemiology, Research, and Informatics Center, Boston (W.E.B.).