DOI:
10.1055/s-00000036
Laryngo-Rhino-Otologie
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References
World Health Organization.
Deafness and Hearing Impairment: Fact Sheet No. 300.2004.
02/2017 Im Internet:
www.who.int/mediacentre/factsheets/fs300/en/ Stand: 03.02.2018
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