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Sergei Kochkin | S. Kochkin
[1] S. Kochkin. MarkeTrak VIII: 25-Year Trends in the Hearing Health Market , 2009 .
[2] Increasing hearing aid adoption through multiple environmental listening utility , 2007 .
[3] Sergei Kochkin,et al. MarkeTrak VII: Customer satisfaction with hearing instruments in the digital age , 2005 .