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Lateral view of the TM with perforations. The sizes of perforations are given in the text. (A) Two perforations: Hole 1—the perforation located in the posterior-inferior quadrant of the TM; Hole 2—the perforation located in the inferior part. (B) Single perforation Hole 3 in the posterior-inferior site. (C) Single perforation Hole 4 in the posterior-inferior site.
