Generalisability - is the degree to which the results of a study or systematic review can be extrapolated to other circumstances, in particular to routine health care situations. Measurements can be used for different purposes. The same measurements will be used for introduction of new programmes or new technologies, such as equipment, medical-technical devices and pharmaceuticals, for extension of the current programmes and treatments (as well as reduction of waiting periods) and organisational and other changes in the health care system.