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Substance Use (Alcohol, Areca Nut and Cigarette) Is Associated with Poor Prognosis of Esophageal Squamous Cell Carcinoma

Figure 1

The Kaplan-Meier survival curve categorized by the number of substance use.

abc groups: a denotes alcohol drinking; b denotes betel nut chewing; c denotes cigarette smoking.

Figure 1

doi: https://doi.org/10.1371/journal.pone.0055834.g001