1. Elion G.B., Hitching& GH, Vanderwerff H. ANTAGONISTS OF NUCLEIC ACID DERIVATIVES VI. PURINES. 1951.
2. Thiopurine S-methyltransferase as a pharmacogenetic biomarker: significance of testing and review of major methods;Asadov;Cardiovasc. Hematol. Agents Med Chem.,2017
3. Thiopurine pathway;Zaza;Pharm. Genom. [Internet],2010
4. Ortego N. [Fármacos Inmunodepresores]. 2016.
5. Gisbert J.P., Gomollón F., Maté J., Pajares J.M. [Individualized therapy with azathioprine or 6-mercaptopurine by monitoring thiopurine methyl-transferase (TPMT) activity]. Rev Clin Esp [Internet]. 2002 [cited 2023 Jun 22];202(10):555–62. Available from: https://pubmed.ncbi.nlm.nih.gov/12361557/.