File:USA anencephaly rates.jpg: Revision history

7 Haziran 2015

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20 Haziran 2011

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9 April 2010

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10 August 2009

• curprev 17:0717:07, 10 August 2009‎ MarkHill talk contribs‎ 480 bytes +480‎ In the U.S.A. the Food and Drug Administration in 1996 authorized that all enriched cereal grain products be fortified with folic acid, with optional fortification beginning in March 1996 and mandatory fortification in January 1998. The data below shows t