Uncertainties in epidemiological studies -- Uncertainties in major radioepidemiological studies -- Uncertainties in noncancer effects -- Uncertainties in genetic/heritable effects of radiation -- Utility and limitations of animal and cellular data in support of -- Epidemiological studies: biomarkers and mechanistic information -- Quantification of uncertainty in radiation risk with a special focus on excess lifetime risk projection and probability of causation of a specific disease -- Role of risk estimates and their uncertainty in radiation protection -- Identification of new epidemiological data for assessing uncertainty in risk estimations.