{{Cite journal| doi = 10.3389/fnut.2024.1335242| issn = 2296-861X (Print) 2296-861X (Electronic) 2296-861X (Linking)| volume = 11| pages = 1335242| last1 = Ritz| first1 = J.| last2 = Wunderle| first2 = C.| last3 = Stumpf| first3 = F.| last4 = Laager| first4 = R.| last5 = Tribolet| first5 = P.| last6 = Neyer| first6 = P.| last7 = Bernasconi| first7 = L.| last8 = Stanga| first8 = Z.| last9 = Mueller| first9 = B.| last10 = Schuetz| first10 = P.| title = Association of tryptophan pathway metabolites with mortality and effectiveness of nutritional support among patients at nutritional risk: secondary analysis of a randomized clinical trial| journal = Front Nutr| date = 2024-03-01| pmid = 38425485}}