3Alayne G,Marlene BG. Anemia and deficiencies of folate and vitamin B6 are common and vary with season in Chinese women of childbearing age[J]. Journal of Nutrition,2000,25(130) :2703-2710.
9National Center for Health Statistics. Health, United States, 2004with chartbook on trends in the health of Americans. Hyattsville,Maryland: 2004. Available at: http://www. cdc. gov/nchs/data/hus/hus04. pdf. Accessible in Jan 2005.
10Katzmarzyk PT. The Canadian obesity epidemic: an historical perspective. Obesity Research, 2002,10: 666-674.