Inhalation SpacersAlbuterolAdministration, InhalationDNA, Ribosomal SpacerInhalation ExposureBronchodilator AgentsNebulizers and VaporizersAdrenergic beta-AgonistsSmoke Inhalation InjuryBurns, InhalationAerosolsAsthmaIpratropiumInhalationMetered Dose InhalersAtropine DerivativesPowdersAdrenergic beta-2 Receptor AgonistsForced Expiratory VolumeFenoterolPeak Expiratory Flow RateCross-Over StudiesEthanolaminesDouble-Blind MethodBronchial Provocation TestsAirway ResistanceBronchoconstrictionMetaproterenolAminophyllineLung