1. Microarray Group, The European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, UK
2. ALCIMED, 84 boulevard Vivier Merle, 69 485 Lyon Cedex 03, France
3. Computational Genomics Unit, Institute of Agrobiotechnology, Center for Research and Technology Hellas, Thessalonica GR-57001, Greece