Figure 1From: Copy Number Amplification of the PIK3CA Gene Is Associated with Poor Prognosis in Non-lymph node metastatic Head and Neck Squamous Cell Carcinoma 115 patients with PIK3CA copy number status . Kaplan-Meier curves for disease-free survival (A) and over-all survival (B). Patients were with or without PIK3CA copy number amplification. The p-values were estimated using the log-rank testBack to article page