four children with congenital hypoplastic anemia ( diamond-blackfan syndrome ) and 30 control children with normal erythropoiesis were studied by a cell culture method in which human marrow , grown in a plasma clot , responds to added erythropoietin ( epo ) with the appearance of discrete colonies of nucleated erythroid cells .
C0949116
congenital hypoplastic anemia
C1260899
diamond-blackfan syndrome