4Baker JW, Mellon M, Wald J, et al. A multiple-dosing, placebocontrolled study of budesonide inhalation suspension given onceor twice-daily for treatment of persistent asthma in young children and infants [ J ]. Pediatrics, 1999,103:414 -421.
5Selroos O,Pietinalho A,Riska H,et al. Effect of early vs late intervention with inhaled corticosteroids in asthma [ J ]. Chest, 1995,108:224-230.
