1. Clermont Université, VetAgro Sup, B.P. 10448, 63000 Clermont-Ferrand, France
2. Ineris, Parc Technologique Alata, B.P. 2, 60550 Verneuil-en-Halatte, France
3. Food Marketing Research, Scottish Agricultural College (SAC), King's Buildings, West Mains Road, Edinburgh EH 9 3JG, United Kingdom