1. Department of Agricultural and Food Sciences, Division of Animal Sciences, University of Bologna, Viale Giuseppe Fanin 46, 40127 Bologna, Italy.
2. Department of Surgical and Medical Sciences, Endocrinology Unit, University of Bologna, Via Massarenti 9, 40138 Bologna, Italy.
3. Associazione Nazionale Allevatori Suini, Via Nizza 53, 00198 Roma, Italy.
4. Department of Statistical Sciences ‘Paolo Fortunati’, University of Bologna, Via Belle Arti 41, 40126 Bologna, Italy.
5. Biocomputing Group, Department of Pharmacy and Biotechnology, University of Bologna, Via San Giacomo 9/2, 40126 Bologna, Italy.