GMD.SCAI, Schloss Birlinghoven, 53754 Sankt Augustin, Germany. Alexander.Zien@gmd.de|GMD.SCAI, Schloss Birlinghoven, 53754 Sankt Augustin, Germany. Alexander.Zien@gmd.de|GMD.SCAI, Schloss Birlinghoven, 53754 Sankt Augustin, Germany. Alexander.Zien@gmd.de|GMD.SCAI, Schloss Birlinghoven, 53754 Sankt Augustin, Germany. Alexander.Zien@gmd.de|GMD.SCAI, Schloss Birlinghoven, 53754 Sankt Augustin, Germany. Alexander.Zien@gmd.de|GMD.SCAI, Schloss Birlinghoven, 53754 Sankt Augustin, Germany. Alexander.Zien@gmd.de