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Decision tree for the definition of occupational asthma. * Variability is defined by the Oasys-2 score as deterioration during a work period or improvement during a period away from work of at least 20%. ** When only ENT symptoms are present, the diagnosis of infraclinic OA is more appropriate. *** IgE Assay (bakers and pastry makers) and prick-tests (hairdressers) were realized for specific occupational allergens.
