title: [ABO system weak phenotypes. Apropos of 2 new cases: phenotypes Ax and Bx].
mesh_terms: D000017:ABO Blood-Group System / Q000235:genetics* / Q000276:immunology; D000328:Adult; D006801:Humans; D008297:Male; D008875:Middle Aged; D010641:Phenotype
chemical_list: D000017:ABO Blood-Group System
vernacular_title: Fenotipos débiles del sistema ABO. Aportación de dos neuvos casos: fenotipos Ax y Bx.