1. National Research Council of Italy, Institute of Sciences of Food Production, (CNR-ISPA), Via G. Amendola 122/O, 70126 Bari, Italy
2. Institute for Reference Materials and Measurements (IRMM), Retieseweg 111, 2440 Geel, Belgium
3. Campden BRI, Chipping Campden GL55 6LD, United Kingdom
4. RIKILT Institute of Food Safety, Wageningen University and Research Centre, Cluster Natural Toxins and Pesticides, P.O. Box 230, 6700 AE Wageningen, the Netherlands