title: Introduction to series on growth factors.
authors.forename: D L
authors.initials: DL
authors.lastname: Longo
mesh_terms: D006133:Growth Substances / Q000502:physiology*; D016211:Transforming Growth Factor alpha / Q000502:physiology; D016212:Transforming Growth Factor beta / Q000502:physiology
chemical_list: D006133:Growth Substances; D016211:Transforming Growth Factor alpha; D016212:Transforming Growth Factor beta