1. a National Research Council (CNR) , Laboratory of Animal Cytogenetics and Gene Mapping , Naples , Italy
2. b Department of Animal Production and Food Inspection , University “Federico II” , Naples , Italy
3. c Applied Epigenetic Laboratory , Experimental Institute Lazzaro Spallanzani , Lodi , Italy
4. d Blood Group Laboratory (LGS) , Soc. Coop. A.R.L. , Cremona , Italy