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Percentages of patients receiving chemotherapy according to RS risk categories. 1.7%, 12.9%, and 66.4% of patients with low-, intermediate-, and high-risk RS were recorded with “Yes” of chemotherapy, respectively, while 98.3%, 87.1%, and 33.6% of patients with low-, intermediate-, and high-risk RS were recorded with “No/Unknown” of chemotherapy, respectively.
