Science Citation Index Expanded, Journal of Citation Reports, Index Medicus/MEDLINE, Scopus, EMBASE/Excerpta Medica, IBECS
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Impact factor
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.
SRJ is a prestige metric based on the idea that not all citations are the same. SJR uses a similar algorithm as the Google page rank; it provides a quantitative and qualitative measure of the journal's impact.
F. Chang*, S. Dávila**, V. Ovalles**,1, E. Mejías**, O. Rodríguez**, R. Rodríguez**
*Servicio de Urología, Hospital José María Vargas de Caracas, Ministerio de Salud y Desarrollo Social, San José, Caracas Venezuela.
**Servicio de Medicina Interna, Hospital Central Miguel Pérez Carreño, Instituto Venezolano del Seguro Social, esquina El Pescozón El Paraíso, Caracas. Venezuela.