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. 2019 Sep 18;17:314. doi: 10.1186/s12967-019-2057-2

Fig. 1.

Fig. 1

Flowchart of study design. In step 1, two datasets were collected. In step 2, each dataset was split into a training set to build a predicting model and a testing set to test the model. In step 3, two models were built and used to predict 2 testing groups