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3. Survey of the clinical use of pressurised aerosol inhalers;Epstein, S.W.; Manning, C.P.R.; Ashley, M.J.; Corey, P.N.;Can Med Assoc J,1979
4. Synchronisation of bronchodilator release;Coady, T.J.; Stewart, C.J.; Davies, H.J.;Practitioner,1976
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