Efficient randomization of biological networks while preserving functional characterization of individual nodes - Iorio, Francesco (European Bioinformatics Institute. European Molecular Biology Laboratory) ; Bernardo-Faura, Martí (Centre de Recerca en Agrigenòmica) ; Gobbi, Andrea (Fondazione Bruno Kessler) ; Cokelaer, Thomas (Institut Pasteur. The Center of Bioinformatics, Biostatistics and Integrative Biology) ; Jurman, Giuseppe. (Fondazione Bruno Kessler) ; Saez-Rodriguez, Julio (RWTH Aachen University. Joint Research Centre for Computational Biomedicine)