Authors’ contributions
Conception and design: WG and LX. Provision of study materials or patients: XT, XLiang, JX, KL, XS, XL, XZ and XN. Collection and assembly of data: LX, XLiang, JX, XS, KL. Pathological reviewing the slides of this trial: KS. Clinical evaluation of the study: YL, LX, JX, XLi and XZ. Laboratorial work and molecular biological analysis of this study: XLiang. Data analysis and interpretation: LX and XT. Manuscript writing: LX. Accountable for all aspects of the work: LX, XLiang, JX, XS, KL, KS, YL, XT, XLi, XZ, XN, and WG.