d_validated
Last change: 2022.1
| CODE | DESCRIPTION | FROM_YEAR | TO_YEAR |
|---|---|---|---|
| N | Sent to the validation centre, which confirmed that the symptoms were not produced by ozone | 1984 | |
| NR | Not visited. Material was not sent to the validation center for validation | 1984 | |
| Y | Sent to the validation centre, which confirmed that the symptoms were produced by ozone | 1984 |