1. Department of Family Medicine and Supportive Care Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
2. Department of Social and Preventive Medicine, Sungkyunkwan University School of Medicine, Suwon, Korea
3. Department of Nursing, Far East University, Eumseong, Korea
4. Department of Social and Preventive Medicine & Health Services Research Center, College of Medicine, Hallym University, Chuncheon, Korea
5. Korea Institute for Health and Social Affairs, Sejong, Korea
6. Department of Medicine, Chungbuk National University College of Medicine, Cheongju, Korea
7. Department of Preventive Medicine, Chungbuk National University College of Medicine, Cheongju, Korea
8. Graduate School of Health Science Business Convergence, Chungbuk National University, Cheongju, Korea