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. 2020 Aug 25;12:42. doi: 10.1186/s13089-020-00184-5

Fig. 1.

Fig. 1

M-mode evaluation of pleural vertical displacement and calculus of the comparison index: Skin-to-maximal inspiration point distanceA-skin-to-maximal expiration point distanceBskin-to-maximal inspiration point distanceA×100