1. Cardiology DivisionMassachusetts General Hospital 32 Fruit Street, Yawkey 5984 Boston MA 02114 USA
2. Baim Institute for Clinical Research Boston MA USA
3. Cardiology DivisionBrigham and Women's Hospital Boston MA USA
4. Boston University Boston MA USA
5. Novartis Pharmaceuticals Hanover NJ USA
6. American College of Cardiology Washington DC USA