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To compare the long-term effects of an inhaled corticosteroid with those of a leukotriene modifier on measures of clinical efficacy, subject preference, and safety in patients with persistent asthma. Between November 17, 1998, and May 26, 2000, we conducted a multicenter, randomized, double-blind, double-dummy, parallel-group study of patients aged 15 years or older with persistent asthma. The...
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