All

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 G03 Environment and Public Health D004778 +
  G03.230 Environment D004777 +
   G03.230.400 Noise D009622 
 G03 Environment and Public Health D004778 +
  G03.850 Public Health D011634 +
   G03.850.460 Environmental Pollution D004787 +
    G03.850.460.610 Noise D009622 
      G03.850.460.610.526 Noise, Occupational D009623 
      G03.850.460.610.680 Noise, Transportation D009624 
 H01 Natural Sciences D010811 +
  H01.671 Physics D010825 +
   H01.671.031 Acoustics D000162 +
    H01.671.031.675 Sound D013016 +
     H01.671.031.675.567 Noise D009622