| http://www.w3.org/ns/prov#value | - So they looked at those patients who had very recently -- within the 30 days prior to having a coronary angiogram -- undergone another imaging study that would have given practitioners the same, and usually better-quality, information. (They excluded patients who had intervening diagnoses of new problems during those 30 days, such as heart failure, heart attack or shock.) Among the remaining 37,00
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