Shah, S. S., S. Gupta, J. Vala, S. D. Malhotra, and P. Patel. “Methotrexate Induced Ventricular Arrhythmia As a Medication Error: A Case Report”. International Journal of Basic & Clinical Pharmacology, vol. 8, no. 9, Aug. 2019, pp. 2163-6, doi:10.18203/2319-2003.ijbcp20194133.