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A: Histogram of the 11 most selected features in the 100 iterations of the binary hold-out cross-validation classification for atrial fibrillation (AF) driver localization (pulmonary vein [PV] vs extra-PV). These 11 features were used as a feature set for the clinical test. B: Histogram of the 13 most selected features in the 100 iterations of the 3-class hold-out cross-validation classification: PV vs extra-PV left atrial vs right atrial AF drivers.
