1. Department of Preventive Medicine, Ewha Womans University Seoul Hospital, College of Medicine, Ewha Womans University, Seoul 07804, Korea.
2. Clinical Trial Center, Ewha Womans University Mokdong Hospital, Seoul 07985, Korea.
3. Department of Pediatrics, Ewha Womans University Mokdong Hospital, College of Medicine, Ewha Womans University, Seoul 07985, Korea.
4. Department of Food & Nutrition, College of Human Ecology, Kyung Hee University, Seoul 02447, Korea.