The purpose of this study was to determine changes in screening and performance of invasive diagnostic procedures for Down syndrome between 2001 and 2007.The Society for Maternal-Fetal Me...
来源:《American journal of obstetrics and gynecology》 2009 年 201卷 1期
We investigated behavioral changes in a large cohort of drivers to identify underlying causes of the decline in road casualties in France.In 2001 and 2004, 11,240 participants used self-a...
来源:《American journal of public health》 2009 年 99卷 7期