title: Perinatal expression of the Lewis and secretor blood group systems.
mesh_terms: D000017:ABO Blood-Group System; D000483:Alleles; D001769:Blood; D001789:Blood Group Antigens; D004912:Erythrocytes; D005787:Gene Frequency; D005799:Genes, Dominant; D006801:Humans; D007231:Infant, Newborn; D007983:Lewis Blood Group Antigens; D010641:Phenotype; D012463:Saliva; D014470:Umbilical Cord
chemical_list: D000017:ABO Blood-Group System; D001789:Blood Group Antigens; D007983:Lewis Blood Group Antigens