[1] Natl Acad, Inst Med, Washington, DC USA
[2] Iowa State Univ, Dept Food Sci & Human Nutr, Ctr Res Bot Dietary Supplements, Ames, IA USA
[3] Iowa State Univ, Coll Agr, Ames, IA USA
[4] Iowa State Univ, Coll Human Sci, Ames, IA USA
[5] Cornell Univ, Div Nutr Sci, Ithaca, NY 14853 USA
[6] Texas A&M Univ, Dept Stat, College Stn, TX 77843 USA
[7] Univ Illinois, Ctr Hlth Stat, Chicago, IL USA
[8] Univ Washington, Dept Med, Div Gerontol & Geriatr Med, VA Puget Sound Hlth Care Syst, Seattle, WA 98195 USA
[9] Georgetown Univ, Washington, DC USA
[10] RTI Int, Washington, DC USA
[11] Univ Texas, MD Anderson Canc Ctr, Houston, TX 77030 USA
[12] Univ Wisconsin, Dept Biochem, Madison, WI 53705 USA
[13] Univ Wisconsin, Dept Nutr Sci, Madison, WI 53705 USA
[14] Michigan State Univ, Coll Human Med, E Lansing, MI 48824 USA
[15] Cleveland Clin, Sect Pediat & Adolescent Endocrinol, Cleveland, OH 44106 USA
[16] Univ Iowa, Coll Publ Hlth, Dept Epidemiol, Iowa City, IA USA
[17] Consumers Union, Washington, DC USA