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\bibitem{Vos_etal2007} {\textquotedblleft}\textit{Correlation between severity of sleep apnea and upper airway morphology based on advanced anatomical and functional imaging}{\textquotedblright}. Vos W, de Backer J, Devolder A, Vanderveken O, Verhulst S, Salgado R, Germonpr{\'e} P, Partoens B, Wuyts F, Parizel P, de Backer W, Journal of biomechanics \textbf{40}, 2207 (2007).   http://doi.org/10.1016/j.jbiomech.2006.10.024

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