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. 2016 Jul 13;16:e20.

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Copyright © 2016 The Author(s)

This is an open-access article whereby the authors retain copyright of the work. The article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Contact pressure between opposing faces of the vertical incision. (a) The pressures are indicated by color coding (blue is low compression; red is high compression). The plane of the section is through the incision looking directly at one face of the cut tissue: No negative pressure (0.0 kPa). (b) −40 mm Hg (5.3 kPa) negative pressure; average contact pressure 5.2 kPa; maximum contact pressure 7.6 kPa. (c) −80 mm Hg (10.7 kPa) negative pressure; average contact pressure 10.4 kPa; maximum contact pressure 15.0 kPa.