US Preventive Services Task Force. Guide to Clinical Preventive Services: An Assessment of the
Effectiveness of 169 Interventions. Baltimore, Md: Williams &
The Nature and Extent of Lead Poisoning in Children
in the United States: A Report to Congress . Atlanta, Ga: Agency for
Toxic Substances and Disease Registry, Public Health Service, US Dept
of Health and Human Services; 1988.
Baghurst PA, McMichael AJ, Wigg NR.
et al. Environmental
exposure to lead and children's intelligence at the age of seven
years: the Port Pirie Cohort Study. N Engl J Med.1992;327:1279-1284.
Goyer RA, Cherian MG. Ascorbic acid and EDTA treatment
of lead toxicity in rats. Life Sci.1979;24:433-438.
Holmes HN, Campbell K, Amberg EJ. The effect of vitamin
C on lead poisoning. J Lab Clin Med.1939;24:1119-1127.
Marchmont-Robinson SW. Effect of vitamin C on workers
exposed to lead dust. J Lab Clin Med.1940;26:1478-1481.
Sohler A, Kruesi M, Pfeiffer CC. Blood lead levels in
psychiatric outpatients reduced by zinc and vitamin C. J
Flanagan PR, Chamberlain MJ, Valberg LS. The
relationship between iron and lead absorption in humans. Am J Clin
Lauwerys R, Roels H, Buchet JP, Bernard AA, Verhoeven L, Konings J. The influence of orally-administered vitamin C or zinc on
the absorption of and the biological response to lead. J Occup
Calabrese EJ, Stoddard A, Leonard DA, Dinardi SR. The
effects of vitamin C supplementation on blood and hair levels of
cadmium, lead, and mercury. Ann N Y Acad Sci.1987;498:347-353.
Dawson EB, Harris WA. Effect of ascorbic acid
supplementation on blood lead levels [abstract]. J Am Coll
National Center for Health Statistics. Plan and
operation of the Third National Health and Nutrition Examination
Survey, 1988-94. Vital Health Stat 1.1994;32:1-407.
Simon JA. Vitamin C and cardiovascular disease: a
review. J Am Coll Nutr.1992;11:107-125.
Miller DT, Paschal DC, Gunter EW, Stroud PE, D'Angelo J. Determination of blood lead with electrothermal atomic
absorption using a L'vov platform and matrix modifier. Analyst.1987;112:1701-1704.
Gunter EW, Lewis BG, Koncikowski SM. Laboratory
Procedures Used for the Third Health and Nutrition Examination Survey
(NHANES III), 1988-1994. Atlanta, Ga: US Dept of Health and Human
Services, Public Health Service, Centers for Disease Control and
Prevention, Center for Environmental Health; 1996.
Stata Statistical Software [computer program] Release 5.0. College Station, Tex: Stata Corp; 1996.
Cleveland WS. Robust locally weighted regression and
smoothing scatterplots. J Am Stat Assoc.1979;74:829-836.
Sasieni P. Symmetric Nearest Neighbor Linear
Smoothers: Stata Technical Bulletin-24. College Station,
Tex: Stata Corp; 1995.
Sasieni P, Royston P. Pointwise Confidence
Intervals for Running: Stata Technical Bulletin-41. College
Station, Tex: Stata Corp; 1998.
Tukey JW. Exploratory Data Analysis. Reading,
Mass: Addison-Wesley Publishing Co; 1977.
Suzuki T, Yoshida A. Effect of dietary supplementation
of iron and ascorbic acid on lead toxicity in rats. J Nutr.1979;109:983-988.
Suzuki T, Yoshida A. Effectiveness of dietary iron and
ascorbic acid in the prevention and cure of moderately long-term lead
toxicity in rats. J Nutr.1979;109:1974-1978.
Jacob RA, Skala JH, Omaye ST. Biochemical indices of
human vitamin C status. Am J Clin Nutr.1987;46:818-826.
Jacob RA, Pianalto FS, Agee RE. Cellular ascorbate
depletion in healthy men. J Nutr.1992;122:1111-1118.
Gey KF. Optimum plasma levels of antioxidant
micronutrients: ten years of antioxidant hypothesis on
arteriosclerosis. Bibl Nutr Dieta.1994;51:84-99.
Jacques PF, Sulsky SI, Sadowski JA, Phillips JC, Rush D, Willett WC. Comparison of micronutrient intake measured by a dietary
questionnaire and biochemical indicators of micronutrient status. Am J Clin Nutr.1993;57:182-189.