1. Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria (CREA), Centro di Ricerca Olivicoltura, Frutticoltura e Agrumicoltura (CREA-OFA), Acireale (CT), Italy
2. Food and Nutrition Dept. (DEPAN), Universidade Estadual de Campinas, FEA-UNICAMP, Brazil
3. Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden