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Reasons that episodes of VARTI did not meet HELICS definition (HELICS definition not met in 23 out of 33 VARTI episodes).
| Criteria | Not met |
|---|---|
| Chest x-ray not performed | 16 |
| Chest x-ray performed but did not indicate new infiltrates | 5 |
| Lack of systemic signs | 8 |
| Lack of pulmonary signs | 6 |
| Lack of microbiological evidence | 6 |
