{{Cite journal| doi = 10.1186/s13063-019-3956-5| issn = 1745-6215 (Electronic) 1745-6215 (Linking)| volume = 21| issue = 1| pages = 74| last1 = Ruhle| first1 = A.| last2 = Oehme| first2 = F.| last3 = Link| first3 = B. C.| last4 = Metzger| first4 = J.| last5 = Fischer| first5 = H.| last6 = Stickel| first6 = M.| last7 = Delagrammaticas| first7 = D. E.| last8 = Babst| first8 = R.| last9 = Beeres| first9 = F. J. P.| title = Swiss chocolate and free beverages to increase the motivation for scientific work amongst residents: a prospective interventional study in a non-academic teaching hospital in Switzerland| journal = Trials| date = 2020-01-15| pmid = 31931852}}