Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitleDas GRADE-System.AuthorsKunz, R.; Burnand, B.; Schünemann, H.J.PublicationDer Internist, 2008, Vol 49, Issue 6, p673ISSN0020-9554Publication typeArticleDOI10.1007/s00108-008-2141-9