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    1. Any patient with chest or back pain with a known or suspected thoracic aorta aneurysm must be brought to the hospital and undergo urgent imaging studies to rule out the aneurysm as a cause of the pain

      elective surgical repair is suggested at 5.5 cm in patients without underlying connective tissue disorders, with earlier intervention at 4.5-5.0 cm in patients with connective tissue disorders or bicuspid aortic valve

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    1. volatility and leverage are co-determined and arepro-cyclical; that is, together, they amplify the impact ofshocks. The mechanism, to be specific, is that decliningvolatility reduces the cost of taking on more leverage andfurthers a buildup of risk. The lesson: Risk managers mustresist the temptation to sell volatility when it is low andfalling. The AMH implicitly embraces modeling suchbehavior with heterogeneous agents that use heuristics.