1. Centers for Disease Control and Prevention. NHANES 1999–2000 public data release file documentation. Available at: http://www.cdc.gov/nchs/about/major/nhanes/nhanes99_00.htm. Accessed March 14, 2006.
2. Centers for Disease Control and Prevention. NHANES 2001–2002 public data release file documentation. Available at: http://www.cdc.gov/nchs/about/major/nhanes/nhanes01-02.htm. Accessed March 14, 2006.
3. NHANES 1999–2000 addendum to the NHANES III Analytic Guidelines,2002
4. Centers for Disease Control and Prevention. NHANES analytic guidelines 2004. Available at: http://www.cdc.gov/nchs/data/nhanes/nhanes_general_guidelines_june_04.pdf. Accessed March 14, 2006.
5. Dietary supplement use by US adults: data from the National Health and Nutrition Examination Survey, 1999–2000;Radimer;Am J Epidemiol,2004