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. 2022 Dec 15;45(1):55–63. doi: 10.1007/s00276-022-03060-0

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© The Author(s) 2022

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Fig. 2 — Dry skull specimens show the locations of the external and internal opening of the MEV. A The position of the external opening of the MEV; the distance from each external opening to the asterion and the mastoid tip was measured. B The position of the internal opening of the MEV; the distance from each internal opening of the MEV to the transverse sigmoid sinus junction was measured