Air ConditioningOccupational DiseasesAsthmaBronchial Provocation TestsPrevalenceAnti-Asthmatic AgentsCross-Sectional StudiesRisk FactorsAsthma, Exercise-InducedWorkRespiratory SoundsAdministration, InhalationQuestionnairesPeak Expiratory Flow RateForced Expiratory VolumeAsthma, OccupationalBronchial HyperreactivityAllergensBronchodilator AgentsHypersensitivityAdrenal Cortex HormonesHypersensitivity, Immediate