Efficiency of the blind classification of the three series of tumors by EMts_2PCA.

RPE was defined by the number of correctly classified tumors divided by the number of predicted tumors (either correctly or incorrectly predicted) and GPE was defined by the number of correctly classified tumors divided by the total number of tumors (correctly classified, misclassified or unclassified). ?: unclassified; FTA: follicular thyroid adenoma; PTC: papillary thyroid carcinoma.