The British Society of Paediatric Gastroenterology, Hepatology and Nutrition (BSPGHAN) - http://bspghan.org.uk/
European Society for Paediatric Gastroenterology, Hepatology and Nutrition (ESPGHAN) - http://www.espghan.org
UNICEF UK bottle feeding guidance - https://www.unicef.org.uk/babyfriendly/baby-friendly-resources/bottle-feeding-resources/infant-formula-responsive-bottle-feeding-guide-for-parents/