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Reader response: Low hemoglobin and hematoma expansion after intracerebral hemorrhage

With interest and appreciation, I read the article by Roh et al.,1 which suggested that low hemoglobin levels could be related to hematoma expansion in intracerebral hemorrhage. Although previous studies have shown anemia is associated with worse outcomes in these patients,2,3 the study by Roh et al. is the first one showing that hematoma expansion mediates this association. However, some issues should be noted.