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Quantitative fit testing set‐up. (a) Capnocheck‐2 carbon dioxide detector; (b) Undis BVF‐02 anaesthesia circuit filter; (c) 3D‐printed adaptor; (d) 3M 7501 respirator; (e) 3M 601 fit test adaptor; (f) 3D‐printed cap; (g) PortaCount Pro + 8038 fit tester.
