1. Division of Cardiovascular Research, St. Elizabeth's Medical Center of Boston
2. Program in Cell, Molecular, and Developmental Biology, Sackler School of Biomedical Sciences, School of Medicine, Tufts University, Boston, Massachusetts 02135
3. Molecular Cardiology, Whitaker Cardiovascular Institute, School of Medicine, Boston University, Boston, Massachusetts 02118
4. Cardiovascular Disease Group, Aventis Pharma, Frankfurt 65926, Germany
5. Department of Pathology, Beth Israel Deaconess Medical Center
6. Department of Pathology, Harvard Medical School, Boston, Massachusetts 02215
7. Aventis Gencell, 94403 Vitry sur Seine, France