Background/research question: New diagnostic tests to identify a well-established disease state have to undergo a series of scientific studies from test construction until finally demonstrating a societal impact. Traditionally, these studies are performed with substantial time gaps in between,[for full text, please go to the a.m. URL] Nützliche patientenrelevante Forschung; 21. Jahrestagung des Deutschen Netzwerks Evidenzbasierte Medizin