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Amniotic fluids were obtained from 19 mothers who had previously given birth to a child with cystic fibrosis. Measurement of methylumbelliferyl guanidinobenzoate (MUGB) reactive proteases suggested that all 19 would have unaffected babies. Amongst the first 10 cases to come to term there were 5 infants with cystic fibrosis. It is concluded that MUGB protease titration is not suitable for the early prenatal diagnosis of cystic fibrosis. 相似文献
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