1. Division of Cardiology, Johns Hopkins Medical Institutions, Baltimore, Maryland.
2. Division of Cardiology, National Cancer Institute, G. Pascale Foundation, Naples, Italy.
3. Department of Neurology, Clinical Pharmacology and Toxicology, Cardiovascular Research Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany.
4. Department of Clinical and Biological Sciences, University of Turin, Turin, Italy.
5. Department of Anesthesiology, Johns Hopkins Medical Institutions, Baltimore, Maryland.
6. Radiation Biology Branch, National Cancer Institute, NIH, Bethesda, Maryland.
7. General Pathology Section, Department of Clinical Medicine, University of Perugia, Perugia, Italy.