@misc{indiciaedd76acf08b9f, title = {[Decrease in occurrence of Down's syndrome in Denmark 1980-1982. The effect of prenatal diagnosis].}, author = {B Pilgaard and M Mikkelsen}, year = {1985}, url = {https://pubmed.ncbi.nlm.nih.gov/3156440/}, note = {Source identifier: 3156440} }