4 Private University in the Principality of Liechtenstein, Department of Medical Sciences, Dorfstrasse 24, 9495 Triesen, Principality of Liechtenstein.
5 Drexel University College of Medicine, 2900 W Queen Ln, 19129 Philadelphia, PA, USA.
6 Medicine I, Academic Teaching Hospital Fedkirch, Carinagasse 47, 6800 Feldkirch, Austria.
7 Oslo University Hospital Ullevål, Institute of Clinical Sciences, Kirkeveien 166, University of Oslo, 0450 Oslo, Norway.