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Data gathered for the study
| Method | Data gathered | Time period |
|---|---|---|
| DNA fingerprinting results | Incidence | 1993-2000 |
| Laboratory inventory 1 | Laboratory risk factors (isolation of strains, possible causes of false-positive cultures) | 1997 |
| Laboratory inventory 2 | Laboratory risk factors (characteristics of the safety cabinet, processing of M. tuberculosis cultures) | 1998 |
| Patient questionnaire | Clinical consequences (notification, treatment, contact investigation) | 1995-1999 |
