As a number of studies have pointed out, this is very meaningful:

The lack of standardized, reliable and systematic coding of diagnoses in the outpatient sector renders the availability of valid epidemiological data impossible.

Filzmoser, Peter & Eisl, Alexander & Endel, Florian. (2023). ATC −→ ICD: Determination of the reliability for predicting the ICD code from the ATC code.

icd9_to_atc4.py and inverse.py: from atc4-> icd9 to icd9 -> atc4

disease burden (DB) -> icd9 -> atc4

Insert proportion of population to IHME data given sex_id, age_id, and year.

to-do: update variables in .env.example