20619
Their release is due to myocardial stretch from right ventricular pressure overload . Finally , there are data supporting that NT - proBNP might be useful to put a time frame on atrial fibrillation of unknown onset .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None