1. Department of Food Science and Nutrition, Hallym University, Chuncheon 24252, Korea.
2. Department of Food Science and Nutrition, Dankook University, Cheonan 31116, Korea.
3. Institute of Social Research, Korea University, Seoul 02841, Korea.
4. Department of Sociology, Korea University, Seoul 02841, Korea.
5. Food Policy Division, Bureau of Citizens' Health, City Hall, Seoul 04524, Korea.
6. The Korean Institute of Nutrition, Hallym University, Chuncheon 24252, Korea.