Overview about clinical studies on biomarkers predicting undergrading; + positive association,—negative association.

Overview about clinical studies on biomarkers predicting undergrading; + positive association,—negative association.本概述围绕用于预测分级不足的生物标志物（biomarkers）相关临床研究展开；其中符号“+”代表阳性关联，符号“—”代表阴性关联。