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2. Poor inhaler technique may be perpetuated by clinical staff;Frew, A.J.; Macfarlane, J.T.;Practitioner,1984
3. British Thoracic Society. Guidelines on the management of asthma;Thorax,1993
4. SW The proper use of metered dose inhalers;Newman, S.P.; Clarke;Chest,1984
5. Medical personnel's knowledge of and ability to use inhaling devices;Hanadia, N.; Wittman, R.; Kesten, S.; Chapman, K.;Chest,1994