1. Kangdong Sacred Heart Hospital; Department of Family Medicine; Gil-Dong 445 Gangdong-Gu Seoul Korea, South 134-814
2. National Cancer Center; Division of Cancer Control; 809 Madu-dong, IIsandong-gu Goyang-si Gyeonggi-do Korea, South 411-769
3. Infolumi; 210-202, 421 Pangyo-ro, Bundang-gu Seongnam Gyeonggi-do Korea, South 463-926
4. Korea University Ansan Hospital; Department of Family Medicine; 516 Gojan-Dong Danwon-Gu, Ansan-Si Gyeonggi-Do Korea, South 425-707
5. Chunchon Sacred Heart Hospital; Department of Family Medicine, Hallym University College of Medicine; 153 Gyo-Dong Chunchon Korea, South 200-704