Useful Links American Society for Parenteral and Enteral Nutrition (ASPEN) European Society for Clinical Nutrition and Metabolism (ESPEN) Hellenic Society for Clinical Nutrition and Metabolism (GrESPEN) Polish Society for Parenteral and Enteral Nutrition (POLSPEN) British Association for Parenteral and Enteral Nutrition (BAPEN) European Society for Paediatric Gastroenterology Hepatology and Nutrition (ESPGHAN) Optimum Nutritional Care for All (ONCA) & European Nutrition for Health Alliance (ENHA) European Federation of the Associations of Dietitians (EFAD) World Obesity Federation European Food Safety Authority (EFSA)