{{Cite journal| doi = 10.1136/bmjopen-2020-038079| issn = 2044-6055 (Electronic) 2044-6055 (Linking)| volume = 10| issue = 9| pages = –038079| last1 = Woitok| first1 = B. K.| last2 = Buttiker| first2 = P.| last3 = Ravioli| first3 = S.| last4 = Funk| first4 = G. C.| last5 = Exadaktylos| first5 = A. K.| last6 = Lindner| first6 = G.| title = Patterns of prescription opioid use in Swiss emergency department patients and its association with outcome: a retrospective analysis| journal = BMJ Open| date = 2020-09-27| pmid = 32978199}}