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(A) Kaplan–Meier analysis for disease-free survival for thoracoscopic thymectomy in thymoma stratified by Masaoka stage. (B) Kaplan–Meier analysis for disease-free survival for thoracoscopic thymectomy in thymoma stratified by the WHO classification. (C) Kaplan–Meier analysis for disease-free survival for thoracoscopic thymectomy in thymoma stratified by the procedures. The P-value was calculated by two-sided log-rank test. Time, in months, from thymectomy plotted on the X-axis.
