1 Seoul National University Medical Research Center, Seoul 03080, Korea.
2 Department of Nutritional Science and Food Management, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea.
3 Department of Medicine, Seoul National University College of Medicine, Seoul; Department of Family Medicine, Seoul National University Health Service Center, Seoul 08826, Korea.
4 Department of Internal Medicine, Seoul National University Boramae Medical Center, Seoul 07061, Korea.
5 Department of Family Medicine, SMG - SNU Boramae Medical Center, 20, Boramae-ro 5-gil, Dongjak-gu, Seoul 07061, Korea.
6 Health Promotion Center, Chung-Ang University Hospital, Seoul 06973, Korea.