1. Department of Bioinformatics, Fraunhofer Institute for Algorithms and Scientific Computing (SCAI) , Schloss Birlinghoven, 53757 Sankt Augustin, Germany
2. Knowledge Management, German National Library of Medicine (ZB MED)—Information Centre for Life Sciences , Friedrich-Hirzebruch-Allee 4, Bonn 53115, Germany
3. Graduate School DILS, Bielefeld Institute for Bioinformatics Infrastructure (BIBI), Faculty of Technology, Bielefeld University , Postfach 10 01 31, Bielefeld, Nordrhein-Westfalen 33501, Germany
4. Bonn-Aachen International Center for Information Technology (B-IT), University of Bonn , Friedrich-Hirzebruch-Allee 6, Bonn 53113, Germany
5. Information management, Institute of Geodesy and Geoinformation, University of Bonn , Katzenburgweg 1a, Bonn 53115, Germany