Swiss Institute of Bioinformatics (SIB), CH-1015 Lausanne, Switzerland. alexandre.kuhn@isb-sib.ch|Swiss Institute of Bioinformatics (SIB), CH-1015 Lausanne, Switzerland. alexandre.kuhn@isb-sib.ch|Swiss Institute of Bioinformatics (SIB), CH-1015 Lausanne, Switzerland. alexandre.kuhn@isb-sib.ch