1. Center for Cardiovascular Research, University of Rochester School of Medicine and Dentistry, Rochester NY 14642-8679, USA
2. Department of Neurobiology, Tottori University Faculty of Medicine, Yonago 683, Japan
3. Department of Pathology, Tottori University Faculty of Medicine, Yonago 683,Japan
4. National Cardiovascular Center Research Institute, Osaka 565, Japan