| Field Name | Format | Description |
|---|---|---|
| PATIENT | Character or Numeric | *Required Code to identify patient (Cohort Patient ID) |
| COHORT | Character | *Required Code/name of the cohort Cohort may be equivalent to center, program or region, as long as PATIENT is unique within that set. |
| PAT_OTH | Character | *Required Unique patient identifier in other cohort |
| COH_OTH | Character | *Required Name of the other cohort |