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|  | The Anatomical Therapeutic Chemical (ATC) classification system |  | 
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 Level 3
 
 C - Cardiovascular systemC05 - VasoprotectivesC05B - Antivaricose therapy
 
 C05BA - Heparins or heparinoids for topical useC05BB - Sclerosing agents for local injectionC05BX - Other sclerosing agents
 
 
 
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