1. Department of Medical Science, The Graduate School of Ewha Womans University, Seoul, Korea.
2. Research Institute for Healthcare Policy, Korean Medical Association, Seoul, Korea.
3. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
4. Research Agency for Clinical Practice Guidelines, Research Center, Korean Academy of Medical Sciences, Seoul, Korea.
5. Department of Preventive Medicine, Ewha Womans University School of Medicine, Seoul, Korea.