title: Embryonic differentiation of lymphoid stem cells. A review.
mesh_terms: D000663:Amphibians / Q000196:embryology*; D000818:Animals; D001402:B-Lymphocytes / Q000166:cytology; D001717:Birds / Q000196:embryology*; D002060:Bursa of Fabricius / Q000166:cytology; D002454:Cell Differentiation; D002642:Chick Embryo; D006412:Hematopoietic Stem Cells / Q000166:cytology; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000166:cytology*; D008322:Mammals / Q000196:embryology*; D013601:T-Lymphocytes / Q000166:cytology; D013950:Thymus Gland / Q000166:cytology