Errors in plasma creatine kinase estimations on fetal blood samples resulting from contamination with amniotic fluid and maternal blood: Relevance for the prenatal diagnosis of duchenne muscular dystrophy
1. Biochemistry Department, Guy's Hospital Medical School, London SEI 9RT, U.K.;2. Department of Obstetrics and Gynaecology, King's College Hospital Medical School, London SE5, U.K.