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1 Noise level of drilling instruments during mastoidectomy
Ho Ki Lee, Ek Ho Lee, Jae Young Choi, Hong Shik Choi, Hee Nam Kim
Yonsei Med J.1999;40(4):339-342.   Published online 2002 February 20     DOI: http://dx.doi.org/10.3349/ymj.1999.40.4.339
      

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