National Children's Study expands.

摘要

WITH NEARLY 40 OF THE planned 105 sites across the United States recruiting, the pilot phase of the National Children's Study is well under way, after years of uncertainty.The study will follow up more than 100 000 infants and their mothers from before conception through the child's 21st birthday and may provide critical information about how environmental and genetic factors contribute to disease. Unprecedented in its scope and length, the study has faced both logistic and funding challenges since it was authorized by Congress as part of the Children's Health Act of 2000.