3Matthys H,PohL M,Braig H,et al.The cardiopulmonary effects of celiprolol and propranolol in asymptomatic bronchial asthmatics.Br J Clin Pract Suppl,1985,40:33.
4Lindgren S,Bake B,Larsson S,et al.Clinical consequences of inadequate inhalation technique in asthma therapy.Eur J Respir Dis,1987,70:93-98.
5Plaza V,Sanchis J.Medical personnel and patient skill in the use of metered dose inhalers:a multicentric study.CESEA Group Respiration,1998,65:195-198.
6Van-Beerendonk I.Assessment of the inhalation technique in outpatients with asthma or chronic obstructive pulmonary disease using a metered-dose inhaler or d-279ry powder device.J Asthma,1998,35:273.