1. Tryptophan and kynurenine levels in patients with obstructive sleep apnea syndrome
   Rabia Şemsi et al, 2022, Biophotonics, Tryptophan and Disease CrossRef
2. Immunotolerant indoleamine‐2,3‐dioxygenase is increased in condyloma acuminata
   Z. Xie et al, 2017, British Journal of Dermatology CrossRef
3. Determination of Kynurnine and Tryptophan, Biomarkers of Indoleamine 2,3-Dioxygenase by LC–MS/MS in Plasma and Tumor
   Wenyan Wang et al, 2018, Bioanalysis CrossRef
4. Status of tryptophan metabolites in different stages of chronic kidney disease of non-diabetc etiology
   Ivana Isakov et al, 2022, Medicinski pregled CrossRef
5. Measurement of kynurenine pathway metabolites by tandem mass spectrometry
   Sedat Abusoglu et al, 2023, Journal of Mass Spectrometry and Advances in the Clinical Lab CrossRef
6. Peripheral kynurenine/tryptophan ratio is not a reliable marker of systemic indoleamine 2,3-dioxygenase: A lesson drawn from patients on hemodialysis
   Yuanhan Chen et al, 2017, Oncotarget CrossRef
7. Red-emitting gold nanoclusters for rapid fluorescence sensing of tryptophan metabolites
   Ditta Ungor et al, 2019, Sensors and Actuators B: Chemical CrossRef
8. Bone Marrow Mesenchymal Stem Cells Alleviate Extracellular Kynurenine Levels, as Detected by High-Performance Liquid Chromatography
   Yuanyuan Wang et al, 2015, Inflammation CrossRef
9. The evaluation of serum tryptophan and kynurenine levels in patients with obstructive sleep apnea syndrome
   Ayşe İriz et al, 2021, Sleep and Breathing CrossRef
10. Chromatographic analysis of tryptophan metabolites
    Ilona Sadok et al, 2017, Journal of Separation Science CrossRef
11. Effects of tryptophan metabolism on the brain: From early development to Alzheimer's disease
    Adrián Rodríguez-Contreras et al, 2022, Biophotonics, Tryptophan and Disease CrossRef
12. Analysis of Kynurenine/Tryptophan ratio and expression of IDO1 and 2 mRNA in tumour tissue of cervical cancer patients
    Jayakumar Hascitha et al, 2016, Clinical Biochemistry CrossRef