Interuniversity Institute of Bioinformatics in Brussels, ULB-VUB, Brussels, Belgium.|ESAT-STADIUS, KU Leuven, Kasteelpark Arenberg 10, Leuven, Belgium.|Institute of Biosciences and Medical Technology, Arvo Ylpxc5x91n katu 34, Tampere, Finland.|Department of Computer Science and Engineering, University of Bologna, Bologna, Italy.|ESAT-STADIUS, KU Leuven, Kasteelpark Arenberg 10, Leuven, Belgium.|Interuniversity Institute of Bioinformatics in Brussels, ULB-VUB, Brussels, Belgium.