Correction: Combining MAD and CPAP as an effective strategy for treating patients with severe sleep apnea intolerant to high-pressure PAP and unresponsive to MAD.

[This corrects the article DOI: 10.1371/journal.pone.0187032.].

Fig 4 is incorrect. Please see the corrected Fig 4 here.

Fig 4

The (A) residual apnea-hypopnea index (AHI), (B) residual oxygen desaturation index (ODI), and (C) residual percentage of total sleep time with SpO2 <90% (%TST-SpO2 <90%) before and under treatments with PAP, MAD, and CT in 14 patients. PAP, continuous positive airway pressure; MAD, mandibular advancement device; CT, combination therapy. Each dot represents a measurement of an individual patient. The p values were analyzed by Tukey’s correction: # p < 0.05 and ### p < 0.005 compared with pretreatment values; * p < 0.05, ** p < 0.01, and *** p < 0.005 compared with PAP therapy; § p < 0.05 and §§§ p < 0.005 compared with MAD therapy.