realizes has occurrent part has_specified_input concretizes population survey case definition case series CaseSeries An investigation following a disease state study design that includes a population survey as part, where a case definition used in the population survey to ascertain disease state. An investigation that realizes the concretization of some disease state design and that has as an occurrent part some population survey that has specified input some case definition. Matthew Diller William R. Hogan investigation disease state design