Oxygen use among chronic obstructive pulmonary disease (COPD) patients by calendar year and by rolling 12 months.
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资源简介：
Oxygen use determined by number of defined from Healthcare Common Procedure Coding System (HCPCS) code E1390-E1392 from the DME file. Oxygen use among chronic obstructive pulmonary disease (COPD) patients by calendar year and by rolling 12 months.
创建时间：
2015-03-18
