Computational Biochemistry Group, Institute of Biochemistry, Charite-University Medicine Berlin, Charitéplatz 1, Berlin.|Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University Tubingen, Tuebingen, Germany.|Computational Biochemistry Group, Institute of Biochemistry, Charite-University Medicine Berlin, Charitéplatz 1, Berlin.|Computational Biochemistry Group, Institute of Biochemistry, Charite-University Medicine Berlin, Charitéplatz 1, Berlin.