1. CEBAS (CSIC) Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology; P.O. Box 164, 30100 Campus University Espinardo; Murcia Spain
2. REQUI M TE/Laboratório de Farmacognosia, Departamento de Química, Faculdade de Farmácia; Universidade do Porto; R. Aníbal Cunha 164 4050-047 Porto Portugal