Global Medical Oxygen Equipment Market Assessment, By Product [Oxygen Source Equipment, Oxygen Delivery Devices], By Portability [Stationary, Portable], By Application [Chronic Obstructive Pulmonary Disease (COPD), Asthma, Cystic Fibrosis, Respiratory Distress Syndrome, Pneumonia, Others], By End-user [Hospitals, Homecare Settings, Ambulatory Surgical Centers], By Region, Opportunities and Forecast, 2017-2031F