1. Department of Medical Informatics, Erasmus University Medical Center, Rotterdam, CA, Netherlands
2. Elsevier B.V., Radarweg 29, Amsterdam NX, The Netherlands
3. Elsevier Information Systems GmbH, Theodor-Heuss-Allee 108, Frankfurt, Germany
4. Elsevier Limited, 125 London Wall, London, UK
5. OntoChem IT Solutions GmbH, Blücherstraße 24, Halle (Saale), Germany