# Task: Calculate Norepinephrine-Equivalent Dose (Raw Tables)

All derived shortcut tables have been removed from the task database.
You must derive the requested concept from source clinical tables.

Calculate the norepinephrine-equivalent dose (NED) for each vasopressor
administration interval, enabling comparison across different vasopressor
agents.

Include only intervals where at least one vasopressor is active
(norepinephrine, epinephrine, phenylephrine, dopamine, vasopressin).
Exclude intervals with only inotropes (dobutamine, milrinone).

Round NED to 4 decimal places.

Output a CSV file to `{output_path}` with these exact columns:
stay_id, starttime, endtime, norepinephrine_equivalent_dose
