In contrast to `join_regimen`, which joins two consecutive regimens together, `merge_regimen` merges two or more regimens given at the same time. This can e.g. be used to define regimens for multi-drug models.
In contrast to `join_regimen`, which joins two consecutive regimens together, `merge_regimen` merges two or more regimens given at the same time. This can e.g. be used to define regimens for multi-drug models.