Branches groups the atlas own nineteen-discipline spine: the named sub-fields of population health and wellbeing this atlas covers, from biostatistics and epidemiology through nutrition science, exercise science and health systems and policy. Belongs here: the discipline entities themselves, each one a field of study or practice with its own history, methods and institutions. Does not belong here: a specific concept, milestone, figure, institution, practice or program that a discipline contains, each filed under its own type and linked to its branch through the in-branch relationship.