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.
Su et al. BMC Public Health 2010 10:67 doi:10.1186/1471-2458-10-67