All Thiopurines Are Equal But Some Thiopurines Are More Equal

To the Editor With interest, we read the clinically important article by Ertz-Archambault et al 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.

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