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 Level 3
 
 G - Genito urinary system and sex hormonesG04 - UrologicalsG04C - Drugs used in benign prostatic hypertrophy
 
 G04CA - Alpha-adrenoreceptor antagonistsG04CB - Testosterone-5-alpha reductase inhibitorsG04CX - Other drugs used in benign prostatic hypertrophy
 
 
 
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