1. A method of determining whether an individual has an expression profile that indicates health, or an expression profile that indicates disease condition, comprising measuring the expression levels of the plurality of molecules in a specimen from said individual, and assessing whether the expression levels of a plurality of molecules in said specimen fall within health-associated reference expression regions for said plurality of molecules, wherein expression levels within said health-associated reference expression regions indicate health and wherein expression levels outside said health-associated reference expression regions indicate disease condition.