1. Department of Cardiology and Angiology; Medizinische Hochschule Hannover; Carl Neuberg Str. 1 30625 Hannover Germany
2. Inst. of Heart and Circulatory Physiology; University of Duesseldorf; Germany
3. Department of Human Genetics; University of Saarland; Homburg Germany
4. Department of Visceral and Transplant Surgery; Medizinische Hochscule; Hannover Germany
5. Department of Pediatric Hematology and Oncology; Medizinische Hochschule; Hannover Germany