Methotrexate Toxicity in a Patient With Renal Failure Despite a Normal Methotrexate Concentration: A Case Report and Literature Review. - Afra, Fatemeh; Ghoddusi, Mahshad; Mottahedi, Mahsa; Albaji, Maryam; Kafan, Samira; Saedpanah, Roya; Shokri, Amir; Nazar, Elham (Clinical Case Reports, 2026)