Wanted: Volunteers, All Pregnant (Published 2010)

ON BOARD Alejandra, a 30-year-old waitress in Queens, is part of a government study of children’s health that will follow her and her daughter, Isabella, shown with her husband, José, for 21 years.Credit...Suzanne DeChillo/The New York Times The woman sent by government scientists visited the Queens apartment repeatedly before finding anyone home. And the person who finally answered the door � a 3

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105カ国、妊婦10万人の巨大コホート。生後、21歳まで追跡。費用は$6.7 billion。