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. 2022 Feb 1;23:3. doi: 10.1186/s40510-021-00397-x

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Fig. 1 — The study flow diagram. PE, Physical Evaluation; ESS, Epworth Sleepiness Scale; QSQ, Quebec Sleep Questionnaire; HST, Home Sleep Test; CBCT, Cone Beam Computerized Tomography; MSE, Maxillary Skeletal Expansion