Affiliation: | 1. Department of Global Public Health and Primary Care, Research Group for Occupational and Environmental Medicine, University of Bergen, ?rstadveien 21, 5009, Bergen, Norway 2. Faculty of Technology, S?r-Tr?ndelag University College, EC Dahls Gate 2, 7030, Trondheim, Norway 3. Royal Norwegian Navy Medical Services, Haakonsvern, 5886, Bergen, Norway 4. Department of Audiology, Haukeland University Hospital, Jonas Liesvei 65, 5021, Bergen, Norway
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