{{Cite journal| doi = 10.1007/s40520-018-1067-x| issn = 1720-8319 (Electronic) 1594-0667 (Linking)| volume = 31| issue = 9| pages = 1233–1242| last1 = Bahrmann| first1 = A.| last2 = Benner| first2 = L.| last3 = Christ| first3 = M.| last4 = Bertsch| first4 = T.| last5 = Sieber| first5 = C. C.| last6 = Katus| first6 = H.| last7 = Bahrmann| first7 = P.| title = The Charlson Comorbidity and Barthel Index predict length of hospital stay, mortality, cardiovascular mortality and rehospitalization in unselected older patients admitted to the emergency department| journal = Aging Clin Exp Res| date = 2018-11-09| pmid = 30406920}}