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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Severity criteria within the two groups: (A) Dimension of the hematoma (considered as the sum of the two major diameters on the three planes ÷ 2); (B) % of dropping of hemoglobin (>2–3 g/dL).