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Aerosol source groups
| 1 | Autopsy |
| 2 | Cleaning tasks |
| 3 | Gastrointestinal (not further specified) |
| 4 | Inhaled therapy |
| 5 | Labour and delivery |
| 6 | Oronasal |
| 7 | Upper gastrointestinal |
| 8 | Laboratory |
| 9 | Lower gastrointestinal |
| 10 | Patient care |
| 11 | Tracheobronchial |
| 12 | Wound/invasive procedure |
