{{Cite journal| issn = 1747-4892 (Electronic) 1747-4884 (Linking)| volume = 18| issue = 4| pages = 232–238| last1 = Wachelder| first1 = J.| last2 = Stassen| first2 = P. M.| last3 = Fourmanov| first3 = R. S.| last4 = Nickel| first4 = C. H.| last5 = Haak| first5 = H. R.| title = Higher In-Hospital Mortality in Patients with Nonspecific Complaints Presenting to the Emergency Department| journal = Acute Med| date = 2020-01-09| pmid = 31912054}}