1. Vascular Research Laboratory, Providence Veterans Affairs Medical Center, Providence, Rhode Island
2. Department of Molecular Pharmacology, Physiology, and Biotechnology, Brown University, Providence, Rhode Island
3. Department of Surgery and
4. Department of Medicine, Cardiovascular Research Center, Rhode Island Hospital and Alpert Medical School of Brown University, Providence, Rhode Island
5. Lerner Research Institute, Cleveland Clinic, Cleveland Ohio; and
6. Department of Medicine, Warren Alpert Medical School of Brown University, Providence, Rhode Island