1. Departments of Medicine I (M.E., K.B., K.H.U.), D-60590 Frankfurt am Main, Germany
2. II (S.Z.), D-60590 Frankfurt am Main, Germany
3. Department of Surgery (A.S.-M., A.E.), Johann Wolfgang Goethe University, D-60590 Frankfurt am Main, Germany
4. IV (C.B.), D-60590 Frankfurt am Main, Germany