“…In the JAMA Clinical Challenge titled “Decreased Exercise Tolerance in a Young Woman,” published in the September 8, 2020, issue of JAMA , a figure and figure legend were incorrect. In Figure 2, anatomical structures were incorrectly labeled and the accompanying legend should have read “Cardiac magnetic resonance imaging in the axial plane demonstrating the sinus venosus defect in relation to the left atrium and right atrium.” This article was corrected online.…”