1. Section for Heart Failure, Department of Cardiology; Karolinska University Hospital; N305, 171 76 Stockholm Sweden
2. Division of Endocrinology, College of Physicians and Surgeons; Columbia University; New York NY USA
3. Division of Cardiology, College of Physicians and Surgeons; Columbia University; New York NY USA
4. Institute of Human Nutrition, College of Physicians and Surgeons; Columbia University; New York NY USA
5. Salisbury University; Salisbury MD USA
6. Section of Cardiology, Department of Medicine; Tulane University School of Medicine; New Orleans LA USA