Letter to the editor in response to: Measuring success in pig to non‐human‐primate renal xenotransplantation: Systematic review and comparative outcomes analysis of 1051 life sustaining NHP renal allo‐ and xeno‐transplants by Firl and Markmann. Issue 7 (7th March 2022) - Anwar, Imran J.; DeLaura, Isabel; Gao, Qimeng; Knechtle, Stuart; Kwun, Jean