IGHG3 and atherosclerosis: This showed that LO1-750 (Supplementary Figure 2A) but not IgG3-750 (Supplementary Figure 2B) localized to a region of interest (ROI) encompassing the ascending thoracic aorta and aortic arch, including some areas of calcified atherosclerosis as seen on a separate contrast-enhanced CT (Supplementary Figure 2C,D).