1 CREA Research Centre for Genomics and Bioinformatics, Via San Protaso 302, Fiorenzuola d'Arda, 29017, Italy.
2 DiSIT, Dipartimento di Scienze e Innovazione Tecnologica, University of Piemonte Orientale, Piazza S. Eusebio 5, Vercelli 13100, Italy.
3 CREA Research Centre for Genomics and Bioinformatics, Via San Protaso 302, Fiorenzuola d'Arda, 29017, Italy. Electronic address: luigi.cattivelli@crea.gov.it.