1. Department of Legal Medicine; University Medical Center Hamburg-Eppendorf; Butenfeld 34 22529 Hamburg Germany
2. Department of Cardiology and Pneumology; University Hospital Goettingen; Robert-Koch-Strasse 40 37075 Goettingen Germany
3. Department of Medical Biometry and Epidemiology; University Medical Center Hamburg-Eppendorf; Martinistrasse 52 20246 Hamburg Germany