Computational Systems Biology Group, Systems Biology Program, Spanish National Centre for Biotechnology (CNB-CSIC), Madrid, Spain.|Computational Systems Biology Group, Systems Biology Program, Spanish National Centre for Biotechnology (CNB-CSIC), Madrid, Spain.|Computational Systems Biology Group, Systems Biology Program, Spanish National Centre for Biotechnology (CNB-CSIC), Madrid, Spain.|Computational Systems Biology Group, Systems Biology Program, Spanish National Centre for Biotechnology (CNB-CSIC), Madrid, Spain.