Use of low-dose oral theophylline as an adjunct to inhaled corticosteroids in preventing exacerbations of chronic obstructive pulmonary disease : study protocol for a randomised controlled trial
Citation
Devereux , G , Cotton , S , Barnes , P , Briggs , A , Burns , G , Chaudhuri , R , Chrystyn , H , Davies , L , De Soyza , A , Fielding , S , Gompertz , S , Haughney , J A F , Lee , A J , McCormack , K , McPherson , G , Morice , A , Norrie , J , Sullivan , A , Wilson , A & Price , D 2015 , ' Use of low-dose oral theophylline as an adjunct to inhaled corticosteroids in preventing exacerbations of chronic obstructive pulmonary disease : study protocol for a randomised controlled trial ' , Trials , vol. 16 , 267 . https://doi.org/10.1186/s13063-015-0782-2