The Anatomical Therapeutic Classification (ATC) code for the drug assigned by the World Health Organization Anatomical Chemical Classification System.
ATC_Codes_Druga tibble with 4 variables:
drug related atc code
atc-code related level_n
atc-code and level_n related code_n
drugbank id
Each drug may have one or more atc-code.
Each atc-code has one or more level.
The atc-code and level elements each have a code which specifies the code assigned by World Health Organization Anatomical Chemical Classification System.