Assertion: adenosine's effect | /r/HasProperty | calculated
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Source sentences:
text: The maximal effect ( ) and the concentration of agonist producing half- (EC 50 ) were calculated by fitting the agonist concentration-response curve data to a Michaelis-Menten type equation, through nonlinear regression using the SPSS for Windows program version 16.0 (SPSS Inc., Chicago, Illinois, USA).