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作者对与成人慢性稳定型哮喘病程恶化有关的临床因素进行了研究。病人和方法哮喘病史＞1年的患者刀例。年龄15－64（平均38）岁。吸人演酚丙喘宁（fenoterolbromide）400ng或安慰剂干粉，每天4次，共24周；随后24周对换使用另一种药物。期间允许额外吸人卜激动剂以缓解症状。扣
The authors studied the clinical factors associated with the worsening of chronic stable asthma in adults. Patient and method Asthma history> 1 year patient knife case. Ages 15-64 (average 38) years old. Inhale 400 ng of fenoterol bromine or placebo dry powder 4 times per day for a total of 24 weeks; then use another drug for 24 weeks. During this period, additional agonist is allowed to relieve the symptoms. buckle