The impact factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years.
a
Servicio de Cardiología, Hospital Gregorio Marañón, Instituto de Investigación Sanitaria Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain
b
Servicio de Cardiología, Hospital Universitario de Bellvitge, Institut d’Investigació Biomedica de Bellvitge (IDIBELL), L’Hospitalet de Llobregat, Barcelona, Spain
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