Nature Reviews Urology (2020) https://doi.org/10.1038/s41585-019-0273-4 Published online 23 January 2020

The originally published article contained errors in the section “Muscle-derived stem cells”. In the original text “In another study, which included 33 patients, a large biopsy of skeletal muscle (5–30 g) was needed to obtain a usable amount of MDSCs, which was associated with donor site pain, bruising and bleeding64. Patients demonstrated significant improvements in pad weight testing following MDSC injection therapy (P < 0.001).” the described patient numbers, biopsy weight, adverse events and P values were incorrect. The text has been corrected to “In another study, which included 38 patients, skeletal muscle biopsy was associated with biopsy site pain and/or bruising (3 of 38 patients)64. Patients demonstrated significant improvements in pad weight testing following MDSC injection therapy (P < 0.01).” The changes have been made in the html and PDF versions of the article.