Figure 3From: Incidence of oral cancer in relation to nickel and arsenic concentrations in farm soils of patients' residential areas in Taiwan Incidence of male OC in relation to levels of soil nickel (mg/kg) (A), or soil arsenic (mg/kg) (B), as stratified by levels of BQC prevalence (per 100 men). In (C), incidence of male OC in relation to soil nickel concentration, stratified by levels of soil arsenic. Both nickel and arsenic have effects on the incidence of OC.Back to article page