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Letter-to-the-Editor of Circulation (QFR)

Jelmer Westra and colleagues from Aarhus University Medical Center wrote a Letter-to-the-Editor of Circulation regarding a publication earlier this year by WF Fearon et al, entitled :Accuracy of fractional flow reserve derived from coronary angiography (Circulation 2019; 140: e94-e95; doi:10.1161/CirculationAHA.118.038282). In the same issue the response by Dr WF Fearon was published (Circulation 2019; 140:e96-e97; doi:10.1161/CirculationAHA.119.040942).