1. Department of Applied Mathematics, University of Granada, 18071 Granada, Spain
2. Department of Computer Architecture and Computer Technology, Information and Communications Technology Centre (CITIC-UGR), University of Granada, 18010 Granada, Spain
3. Systems Biology Group, Dip. Automatica e Informatica, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy
4. School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Oxford Road, Manchester M13 9PT, UK
5. Université de Paris, INSERM, BIGR, F-75014 Paris, France