共 23 条
[1]
[Anonymous], 1992, MMWR-MORBID MORTAL W, V41, P1
[2]
[Anonymous], 1996, Federal Register, V61, P8781
[3]
Bentley JR, 1999, AM J PREV MED, V16, P264
[4]
A QUANTITATIVE ASSESSMENT OF PLASMA HOMOCYSTEINE AS A RISK FACTOR FOR VASCULAR-DISEASE - PROBABLE BENEFITS OF INCREASING FOLIC-ACID INTAKES
[J].
JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION,
1995, 274 (13)
:1049-1057
[6]
Centers for Disease Control and Prevention (CDC), 1999, MMWR Morb Mortal Wkly Rep, V48, P325
[7]
*CENTR BUR STAT, 1998, CBS STAT 1998
[8]
*CENTR BUR STAT, 1997, BIRTHS 1992 96, P28