Fig. 2: Comparison of the R-ISS and the R-ISS/PET survival curves.

A, B Overall survival (OS) rates and progression-free survival (PFS) rates by the R-ISS. C, D OS and PFS rates by the R-ISS/PET. Abbreviation: R-ISS Revised International Staging System, R-ISS/PET Revised International Staging System/positron emission tomography.