hyperbaric oxygen therapy for copd patients | 1.84 | 0.8 | 6813 | 43 | 65 |
oxygen therapy for patients with copd | 1.22 | 0.5 | 4034 | 37 | 37 |
oxygen therapy for copd exacerbation | 0.92 | 0.5 | 3619 | 36 | 71 |
hyperbaric oxygen therapy for lung disease | 1.39 | 0.4 | 3549 | 42 | 45 |
oxygen therapy for copd | 1.21 | 0.4 | 9250 | 23 | 33 |
hyperbaric chamber for copd | 0.63 | 0.7 | 2703 | 27 | 42 |
copd patients and oxygen therapy | 1.22 | 1 | 5816 | 32 | 88 |
prognosis for copd patients on oxygen therapy | 1.58 | 0.3 | 4106 | 45 | 26 |
oxygen therapy and copd patients | 1.56 | 1 | 4892 | 32 | 25 |
does oxygen therapy help copd patients | 0.1 | 0.8 | 3846 | 38 | 22 |