S38 Home mechanical ventilation (hmv) and home oxygen therapy (hot) following an acute exacerbation of copd in patients with persistent hypercapnia: predicting 1 year admission-free survival in the hot-hmv uk trial
S38 Home mechanical ventilation (hmv) and home oxygen therapy (hot) following an acute exacerbation of copd in patients with persistent hypercapnia: predicting 1 year admission-free survival in the hot-hmv uk trial