Combination inhaled steroid and long-acting beta2-agonist versus tiotropium for chronic obstructive pulmonary disease

  • Emma J Welsh, Christopher J Cates, Phillippa Poole
  • Cochrane Database of Systematic Reviews, May 2013, Wiley
  • DOI: 10.1002/14651858.cd007891.pub3

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The following have contributed to this page: Dr Christopher J Cates