1. World Health Organization. (2007). Global strategy on diet, physical activity and health: Chronic disease risk factors. http://www.who.int/dietphysicalactivity/publications/facts/riskfactors/en/print.html (accessed February 19, 2007).
2. World Hypertension League. (2007). Know your blood pressure. http://hsc.utoledo.edu/org/whl/know.html (accessed February 27, 2007).
3. Taddei, S., Virdis, A., Ghiadoni, L., Salvetti, G., & Salvetti, A. (2000). Endothelial dysfunction and hypertension. Journal of Nephrology, 13, 205–210.
4. Portaluppi, F., Boari, B., & Manfredini, R. (2004). Oxidative stress in essential hypertension. Current Pharmaceutical Design, 10, 1695–1698.
5. Resnick, L. M. (1993). Ionic basis of hypertension, insulin resistance, vascular disease, and related disorders. The mechanism of “syndrome X”. American Journal of Hypertension, 6, 123S–134S.