{"nct_id":"NCT02233543","title":"A Multicenter, 4-week Crossover (Total Duration 12 Weeks) to Determine the Impact of QVA149 on Nocturnal Oxygen Levels in Chronic Obstructive Pulmonary Disease (COPD)","status":"COMPLETED","status_verified_date":"2017-11","start_date":"2014-11-30","start_date_type":"ACTUAL","primary_completion_date":"2016-06-26","primary_completion_date_type":"ACTUAL","completion_date":"2016-06-26","completion_date_type":"ACTUAL","phases":["PHASE4"],"tickers":["NVS"]}