title: Direct proof of extreme lyonization as a cause of low factor VIII levels in females.
mesh_terms: D002869:Chromosome Aberrations; D005169:Factor VIII / Q000032:analysis*; D005260:Female; D006467:Hemophilia A / Q000235:genetics*; D006579:Heterozygote; D006801:Humans; D010641:Phenotype; D014960:X Chromosome
chemical_list: D005169:Factor VIII