Supplementary_appendix - Clinical outcomes of theophylline use as add-on therapy in patients with chronic obstructive pulmonary disease: A propensity score matching analysis

Supplementary_appendix for Clinical outcomes of theophylline use as add-on therapy in patients with chronic obstructive pulmonary disease: A propensity score matching analysis by Preyanate Wilairat, Kirati Kengkla, Chaiyawat Thayawiwat, Phongsathorn Phlaisaithong, Supakorn Somboonmee, and Surasak Saokaew in Chronic Respiratory Disease