1. Department of Occupational and Environmental Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.
2. Department of Urology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.
3. Department of Mechanical Engineering, University of Ulsan College of Engineering, Ulsan, Korea.
4. Indoor Environment & Noise Research Division, National Institute of Environmental Research, Incheon, Korea.