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
Departamento de Cardiología, Hospital General Universitario Gregorio Marañón, Centro en Investigación Biomédica en Red Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
b
Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
c
Facultad de Medicina, Universidad Europea, Madrid, Spain
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