1Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
2Sandoz Biopharmaceuticals, Holzkirchen, Germany
3Boehringer Ingelheim Pharma, Biberach an der Riss, Germany
4Boehringer Ingelheim Pharma, Ingelheim am Rhein, Germany
5Klinik für Innere Medizin I, Universitaetsklinikum Schleswig-Holstein, Kiel University, Kiel, Germany