1. NIZO Food Research, Kluyver Centre for Genomics of Industrial Fermentation, P.O. Box 20, 6710 BA Ede, Netherlands
2. TI Food and Nutrition, P.O. Box 557, 6700 AN Wageningen, Netherlands
3. Netherlands Bioinformatics Centre, Centre for Molecular and Biomolecular Informatics (CMBI 260), Radboud University Medical Centre, P.O. Box 9101, 6500HB Nijmegen, Netherlands