1. CDC 2015 http://www.cdc.gov/hiv/statistics/overview/index.html
2. WD Johnson et al 2008 Cochrane Database Syst Rev (3):CD001230
3. WHO Page on Nutrition Databases http://www.who.int/nutrition/databases/en/
4. WHO Media Center http://www.who.int/mediacentre/news/releases/2015/world-health-statistics-2015/en/
5. American Dietetic Association 2003 J Am Diet Assoc 103:1046