In “Acknowledgments” on page 2092, NHLBI grant OT3HL147741 should not have been cited. The error has been corrected in the published article.

In supplemental Table 1, rows 48 to 50 were headed “Sickle Cell Disease (SCD)” and rows 51 to 53 were headed “Marrow Failure (other).” All of those rows should have been under the heading “Marrow Failure (other).” The supplemental file has been corrected online.

Supplemental data