1. Hospital Universitario Gregorio Marañon, Madrid, Spain
2. Hospital Xeral-Cíes, Vigo, Spain
3. Hospital Universitario Valle de Hebrón, Barcelona, Spain
4. Hospital Universitario Virgen de la Arrixaca, Murcia, Spain
5. Department of Clinical Nutrition and Diets, Numico Research, Wageningen, The Netherlands.