CDM Table name: LOCATION
Reading from CPRD.Practice

| Destination Field | Source field | Logic | Comment field |
|---|---|---|---|
| location_id | region | ||
| address_1 | |||
| address_2 | |||
| city | |||
| state | |||
| zip | |||
| county | |||
| location_source_value | region | Use practice.region to look up the location_source_value in the prg table. Store prg.txt as location_source_value. |