1. Computer Assisted Clinical Medicine, Heidelberg University, 9144 Mannheim, Germany, 68167 (e-mail: matthias.malzacher@gmx.de)
2. Computer Assisted Clinical Medicine, Heidelberg University, 9144 Mannheim, Germany, (e-mail: lothar.schad@medma.uni-heidelberg.de)
3. Computer Assisted Clinical Medicine, Heidelberg University, 9144 Mannheim, Germany, (e-mail: jorge.chacon@medma.uni-heidelberg.de)