6WHO. Obesity preventing and managing the global epidemic-report of a WHO consultation on obesity. Geneva : WHO, 1997.9-43.
7Nicklaus S,Boggio V, Chabanet C,et al. A prospective study of food preferences in childhood. Food quality and preference, 2004,15:805- 818.
8Wellman HM, Johnson CN. Children's understanding of food and its functions: A preliminary study of the development of concepts of nutrition. Journal of applied developmental psychology, 1982, 3 : 135-148.
9Nguyen SP,Murphy GL. An apple a day keeps the doctor away: crossclassification in children's concepts. Child development, 2003,74: 1783-1806.
10Koopman HM, Baars RM, Chaplin J, et al. Illness through the eyes of the child:the development of children's understanding of the causes of illness. Patient Education and Counseling, 2004,55:363-370.