1. School of Human Ecology, Nutrition and Dietetics Program, Louisiana Tech University, LA 71272 USA.
2. Graduate school of Education, Chung-Ang University, Seoul 156-756, Korea.
3. Ministry for Health, Welfare and Family Affairs, Seoul 110-793, Korea.
4. Department of Home Economics Education, Chung-Ang University, Heukseok-dong, Dongjak-gu, Seoul 156-756, Korea.
5. Department of Food and Nutrition, Kyung Hee University, Seoul 130-701, Korea.