Groningen Bioinformatics Center, University of Groningen, Kerklaan 30, 9751 NN Haren, The Netherlands.|Groningen Bioinformatics Center, University of Groningen, Kerklaan 30, 9751 NN Haren, The Netherlands.|Groningen Bioinformatics Center, University of Groningen, Kerklaan 30, 9751 NN Haren, The Netherlands.