MATERIAL AND METHODES: Case-Control study nested in cohort. 300 patients admitted to the hospital from 1.01.05 to 01.07.06. Copenhagen University Hospital, Hvidovre, an 800 beds hospital, covers a part of Copenhagen with a wide variety in the population's socioeconomic and cultural background. For the analysis of markers the luminex 100 lab analysis system is used. It utilizes xMAP® technology which enables you to simultaneously assay up to 100 analytes in a single well of a microtiter plate, using very small sample volumes. Assay development of a 15-plex is don In-house.