1. Department of Medical Genetics, College of Medicine, Hallym University, Chuncheon 24252, Republic of Korea
2. Department of Orthodontics, School of Dentistry, Seoul National University, Seoul 03080, Republic of Korea
3. Department of Orthodontics, The Institute of Oral Health Science, Samsung Medical Center, School of Medicine, Sungkyunkwan University, Seoul 06351, Republic of Korea
4. Department of Social and Preventive Medicine, College of Medicine, Hallym University, Chuncheon 24252, Republic of Korea