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BioMed Research International
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2014
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Article
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Fig 2
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Review Article
From Mouth-to-Mouth to Bag-Valve-Mask Ventilation: Evolution and Characteristics of Actual Devices—A Review of the Literature
Figure 2
Ambu single-shutter valve ((a)
http://helid.digicollection.org/
, (b) Kim et al., 2008 [
16
]).
(a)
(b)