Pichler, A.; Meinitzer, A.; Enko, D.; Schober, P.; Singer, G.; Castellani, C.; Herrmann, M.; Holasek, S. J.; Till, H.; Windhaber, J. M. Tryptophan Recovery Index As a New Biomarker for Fitness. EXCLI J. 2022, 21, 888-896.