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\bibitem{Ayalew_etal2015} {\textquotedblleft}\textit{A survey of occupational exposure to inhalable wood dust among workers in small- and medium-scale wood-processing enterprises in Ethiopia}{\textquotedblright}. Ayalew E, Gebre Y, De Wael K, The annals of occupational hygiene \textbf{59}, 253 (2015).   http://doi.org/10.1093/ANNHYG/MEU086

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