Corresponding Author: António Galvão and Gavin Kelsey

Institute of Animal Reproduction and Food Research of PAS, Olsztyn, Tuwima 10, 10-748 (Poland)
E-Mail a.galvao@pan.olsztyn.pl; Antonio.Galvao@babraham.ac.uk

Epigenetics Programme, Babraham Institute, Cambridge, CB22 3AT (UK)
E-Mail Gavin.Kelsey@babraham.ac.uk