Map of studies participating in LongITools. The size of the circle indicates the relative size of the study. ALSPAC indicates Avon Longitudinal Study of Parents and Children; CONSTANCES, Cohorte des Consultants des Centres d’Examens de Santé; DFBC, Dutch Famine Birth Cohort; EDEN, Etude des Déterminants pré et post natals précoces du développement psychomoteur et de la santé de l’Enfant; ELFE, Etude Longitudinale Française depuis l’Enfance; ELIPA, Foods for Weight Maintenance; Fibrefects, Grain fibre modification for gut-mediated health effects; FinnGeDi, Finnish Gestational Diabetes; NFBC, Northern Finland Birth Cohort; NOMA, Fat Quality on Blood Lipids and Immune Response; OULU1935/45, Born in Oulu in 1935 and 1945; PANIC, Physical Activity and Nutrition in Children; RCGP RSC, Royal College of General Practitioners Research and Surveillance Centre; UKBB, United Kingdom Biobank.