CDKN2B-AS1 and atherosclerosis: Burd et al. (2010) identified circular ANRIL products emanating from the ANRIL locus and deemed them as causal variants at 9p21.3 to regulate INK4/ARF expression, challenging the notion of atherosclerosis risk in association with modulating ANRIL expression and/or structure (Burd et al., 2010).