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1. Department of Urology, University of Occupational and Environmental Health, Japan; Fukuoka Institute of Occupational Health, 2. Department of Oral Biological Science, Division of Dysphagia Rehabilitation, Niigata University Graduate School of Medical and Dental Sciences, 3. Geriatric Dentistry, Niigata University Medical and Dental Hospital, 4. Graduate School of Health Sciences, Okayama University, 5. Department of Urology, Nakamura Hospital, 6. Ito Urology Clinic, 7. Matsushita Urologic Clinic, 8. Sanjukai Urological Hospital, 9. Department of Urology, University of Occupational and Environmental Health, Japan
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