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Characteristics of the study participants.
| Demographics | All (n = 1615) |
| Age, y (25%, 75%) | 32 (26, 43) |
| Men, n (%) | 334 (21) |
| Job titles | |
| Physician, n (%) | 101 (6) |
| Nurse, n (%) | 859 (53) |
| Pharmacist, n (%) | 51 (3) |
| Medical technician, n (%) | 134 (8) |
| Rehabilitation therapist, n (%) | 96 (6) |
| Administrative staff, n (%) | 304 (19) |
| Contractors, n (%) | 70 (4) |
| Contact risk groups | |
| No-contact, n (%) | 1469 (91) |
| Low-risk contact, n (%) | 114 (7) |
| Intermediate-risk contact, n (%) | 32 (2) |
| High-risk contact, n (%) | 0 |
