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. 2016 May 10;6:25464. doi: 10.1038/srep25464

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(a) The Cinestar Cinema in Mainz, Germany, (b) The 230 seat capacity cinema audioreum, (c) the air ventilation system, (d) insertion of the Teflon inlet into the 75 × 75 cm ventilation system. (a,b) are reproduced with permission from Cinestar.