title: The challenge of quantifying exceedingly rare occurrences: we can only see what we see.
authors: David J
authors: DJ
authors: Moliterno
mesh_terms: D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000175:diagnosis; D003330:Coronary Vessel Anomalies / Q000175:diagnosis* / Q000000981:diagnostic imaging; D006801:Humans; D008279:Magnetic Resonance Imaging; D011651:Pulmonary Artery / Q000002:abnormalities / Q000000981:diagnostic imaging; D012850:Sinus of Valsalva / Q000002:abnormalities* / Q000000981:diagnostic imaging