1. 5 a day (National Institutes of Health and National Cancer Institute) http://www.5aday.org (accessed 10/12/06).
2. 3 a day (Kraft and the American Dairy Association) http://www.3aday.org/3aDay/ (accessed 1/6/07).
3. Ahuja, A. (2005) Obesity: don't swallow everything you’re told, The Times, 13 June 2005.
4. America on the move. http://www.americanonthemove.org (accessed 10/6/07).