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. 2021 Apr 22;142(11):3035–3043. doi: 10.1007/s00402-021-03904-1

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© The Author(s) 2021

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Fig. 4 — Left: Measurement method 5 determines an angle between a perpendicular line and a tangent line at the contour of the medial calcaneus. Right: Analogous procedure for measurement 6 using the lateral border of the calcaneus