Dose-response plots for all cancers of oral cavity/pharynx (excluding salivary gland) (panel A) and salivary gland cancers (panel B). Note that y axes are on different scales. Fitted linear (solid line) and linear-quadratic (dashed line) radiation dose-response functions are shown for cancers of the oral cavity and pharynx (excluding salivary gland) (panel A) and salivary gland (panel B). The plot also includes categorical estimates of the excess relative risk (ERR) (points). Separate estimates for the subjects with unshielded kerma >4 Gy are not shown because the number of cases for oral cavity/pharyngeal cancer (excluding salivary grand cancer) and salivary gland cancer among the subjects with unshielded kerma >4 Gy were 1 and 0, respectively.