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i controlli sono stati reclutati dalle liste degli iscritti al sistema sanitario nazionale. sia i casi sia i controlli sono stati intervistati da un’esperta epidemiologa e la loro esposizione all’amianto è stata accuratamente valutata da un igienista industriale.
the controls were recruited from national health system registries. both the patients and the controls were interviewed by an expert epidemiologist and their exposure to asbestos was thoroughly evaluated by an industrial hygienist.