A group of researchers reports in the American Journal of Human Genetics on a genome-wide association study of abdominal aortic aneurysm. For the discovery phase, they looked at 1,866 people with abdominal aortic aneurysm and 5,435 controls, and followed up their nine leads in 2,871 additional cases and 32,687 controls and then in an additional 1,491 cases and 11,060 controls.