To the Editor With interest, we read the clinically important article by Ertz-Archambault et al1 describing the association of immunosuppressive therapy for autoimmune diseases with the development of myelodysplastic syndrome and acute myeloid leukemia. As a key point, the authors state that azathioprine sodium was the only agent associated with a significant risk.
Meijer B, de Boer NKH. All Thiopurines Are Equal but Some Thiopurines Are More Equal Than Others. JAMA Oncol. 2018;4(3):420. doi:10.1001/jamaoncol.2017.0740
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