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 Medical Concepts
  Chemicals and Drugs
 Organic Chemicals
 Hydrocarbons
 Hydrocarbons, Cyclic
 Hydrocarbons, Aromatic
 Benzene Derivatives
 Chlorobenzenes
 Chlorophenols
 Hexachlorophene
 Dicofol
 Dinitrochlorobenzene
 Hexachlorobenzene

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