Is creating ERAs an ETL problem or a era-construction problem.
E.g. we construct cohorts using cohort definitions. We don't ETL cohorts. ETL based tables go to the OHDSI CDM schema, while constructed tables go to results schema.
So, is ERAs a RESULTS schema table or CDM ETL schema table?
If the construction algorithm is defined by the analyst, then RESULTS?
if the construction conventions are determined by community using THEMIS, then CDM?