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Key Record Dates Identifier: NCT01180803
Brief Title: Efficacy of Oxygen Therapy Delivered by Systems Using Oxygen-Saving Valves in COPD Patients

First Submitted : August 11, 2010
First Submitted that Met QC Criteria : August 11, 2010
First Posted : August 12, 2010 (Estimate)

Last Update Submitted that Met QC Criteria : November 20, 2017
Last Update Posted : November 22, 2017