1. Department of Food Science and Biotechnology; Escuela Politécnica National; Quito Ecuador
2. Phytochemistry Laboratory, Department of Food Science and Technology; CEBAS-CSIC, Espinardo; Murcia Spain
3. Food Colour and Quality Laboratory, Department of Nutrition and Food Science; Universidad de Sevilla; Sevilla Spain
4. Department of Biosciences, Faculty of Chemical Sciences; Universidad de Cuenca; Cuenca Ecuador