A Clinical Comparison of Aerosol and Powder Administration of Beclomethasone Dipropionate in Childhood Asthma - Bisgaard, H.; Andersen, J. B.; Bach-Mortensen, N.; Bertelsen, A.; Friis, B.; Koch, B. C.; Prahl, P.; Wichmann, R.; ØSterballe, O. (Blackwell Publishing Ltd, 1984)
http://dx.doi.org/10.1111/j.1398-9995.1984.tb01954.x
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