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Overview of this study. (A) The training data set comprised 344 malignant pGGNs from Zhongshan Hospital. (B) The validation data set comprised 345 malignant pGGNs from four medical centers in China. CT, computed tomography; pGGNs, pure ground-glass nodules; AIS, adenocarcinoma in situ; MIA, minimally invasive adenocarcinoma; IAC, invasive adenocarcinoma.
