1. BioQuant/COS, Heidelberg University, Heidelberg, Germany
2. Department of Computing and Mathematical Sciences, California Institute of Technology, Pasadena, CA, USA
3. European Bioinformatics Institute (EMBL-EBI), Hinxton, Cambrigeshire, United Kingdom of Great Britain and Northern Ireland
4. Hochschule Albstadt-Sigmaringen, Sigmaringen, Germany
5. University of Hertfordshire, Hertfordshire, United Kingdom of Great Britain and Northern Ireland