FGL2 and brain infarction: Of note, in a recent study, serum FGL2 levels tended to strongly correlate with cerebral infarct size in rats with acute cerebral ischemic‐reperfusion injury (Zhang et al., 2015); more recently, serum FGL2 levels were prone to increase in severe traumatic brain injury and its elevation was highly relevant to clinical severity and mortality (Chen et al., 2018), indicating that FGL2 should be a promising biomarker for brain injury.