title: Immunological milestones in the ontogeny of hamster, guinea pig, sheep, and man.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D002454:Cell Differentiation; D002465:Cell Movement; D006224:Cricetinae; D006168:Guinea Pigs; D006801:Humans; D007111:Immunity, Cellular; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000166:cytology / Q000276:immunology; D013154:Spleen / Q000254:growth & development / Q000276:immunology; D013950:Thymus Gland / Q000254:growth & development* / Q000276:immunology