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. 2018 Dec 5;18:186. doi: 10.1186/s12890-018-0748-8

Fig. 3.

Fig. 3

Time to therapy termination by first device used (Cox proportional hazards regression). APAP, automatic continuous positive airway pressure; ASV, adaptive servo-ventilation; Bilevel, bilevel positive airway pressure; CPAP, continuous positive airway pressure; HR, hazard ratio