European Journal of Clinical Investigation  The European Journal of Clinical Investigation is a monthly peer-reviewed medical journal covering all aspects of biomedical research. It was established in 1970 as the continuation of "Archiv für Klinische Medizin", and is published by John Wiley & Sons on behalf of the European Society for Clinical Investigation, of which it is the official journal. The editor-in-chief is Hendrik Nathoe (Utrecht University). According to the "Journal Citation Reports", the journal has a 2017 impact factor of 3.086, ranking it 32nd out of 154 journals in the category "Medicine, General & Internal" and 57th out of 133 journals in the category "Medicine, Research & Experimental".