中国当代医药
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中国当代医药  2020, Vol. 27 Issue (7): 42-44    DOI:
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Impact analysis of combination of Doxofylline and Tiotropium Bromide Powder on pulmonary function in patients with chronic obstructive pulmonary disease
LI Xiao-ming
The First Department of Respiratory, Liaoning Health Industry Group Iron Coal General Hospital, Tieling 112700,China
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