Fig. 1From: Prognostic significance of LINE-1 hypomethylation in oropharyngeal squamous cell carcinomaLINE-1 methylation according to socio-demographic characteristics, smoking habits, tumor features, and surgical treatment. Black horizontal bars represent the median values of LINE-1 methylation for each group. p values were determined by the non-parametric Kruskal–Wallis testBack to article page