1. Department of Clinical Nutrition, Soonchunhyang University Bucheon Hospital, Bucheon 420-767, Korea.
2. Department of Preventive Medicine, Soonchunhyang University College of Medicine, Cheonan 330-930, Korea.
3. Department of Surgery, Soonchunhyang University Bucheon Hospital, Bucheon 420-767, Korea.
4. Department of Food Science & Nutrition, Soonchunhyang University, Asan 336-745, Korea.