Physical examination is focused on identifying evidence of underlying heart disease. Treatment is by addressing the underlying systemic condition. It may require identifying and addressing the underlying complication. Treatment of the underlying cause is crucial. It always occurs when the change in value of the underlying index changes direction. Treatment is based on the underlying cause. Diagnosis is based on sleep habits and an examination to look for underlying causes. Demonstrations of ambiguity between alternative syntactic structures underlying a sentence. Treatments vary based on the underlying condition. For information on futures markets in specific underlying commodity markets, follow the links. The quality of the underlying evidence was also poor. Gamma is the second derivative of the value function with respect to the underlying price. It is possible to estimate the median of the underlying variable. Einstein cited it as one of the three principles underlying general relativity. Rates of mortality increase with progression of the underlying liver disease.