The article titled “Matrix metalloproteinases 2 and 9 work in concert to produce aortic aneurysms” has been co-cited 391 times, “Angiotensin II promotes atherosclerotic lesions and aneurysms in apolipoprotein E-deficient mice” has been co-cited 348 times, “Inflammation and cellular immune responses in abdominal aortic aneurysms” has been co-cited 296 times, “Inflammatory cytokines in vascular dysfunction and vascular disease” has been co-cited 268 times, and “Inflammation and matrix metalloproteinases in the enlarging abdominal aortic aneurysm” has been co-cited 256 times. The gene discussed is APOE; the disease is aortic aneurysm.