Correction to: Trials

http://dx.doi.org/10.1186/s13063-019-3698-4

Following publication of the original article [1], the authors reported that Fig. 1 had not been corrected based on the reviewer’s comments. The correct Fig. 1 is presented below.

Fig. 1
figure 1

Schematic overview of the study design. Patients will undergo three titration procedures —subjective titration (green), titration PSG (orange) and, titration DISE (yellow) — in randomized order. This leads to six different possible sequences. A 1-week washout period is integrated between the different titration procedures. A follow-up sleep study is performed at the end of each titration method. DISE, drug-induced sleep endoscopy; MAD, mandibular advancement device; PSG, polysomnography