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
Main Authors: | , , , , , , , , , , , , , , , , , , , |
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Format: | Online |
Language: | English |
Published: |
BioMed Central
2015
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Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4465017/ |