1. Department of Preventive Medicine Dankook University College of Medicine Cheonan Republic of Korea
2. Division of Cancer Registration and Surveillance, National Cancer Control Institute National Cancer Center Goyang Republic of Korea
3. Department of Preventive Medicine, College of Medicine The Catholic University of Korea Seoul Republic of Korea
4. Radio Technology Research Department ETRI Daejeon Republic of Korea
5. Department of Neurosurgery, Ajou University School of Medicine Ajou University Hospital Suwon Republic of Korea