1. Department of Gerontal Health and Welfare; Pai Chai University; Daejeon Korea
2. Department of Preventive Medicine; Yonsei University Wonju College of Medicine; Wonju Korea
3. Department of Biostatistics and Computing; The Graduate School of Yonsei University; Seoul Korea
4. Korea Prostate Health Council; Seoul Korea
5. Department of Urology; Yonsei University Wonju College of Medicine; Wonju Korea
6. Manmohan Memorial Institute of Health Science; Solteemode, Kathmandu Nepal
7. Department of Family Medicine; Yonsei University Wonju College of Medicine; Wonju Korea