Use of an occlusion balloon in transbronchial lung cryobiopsy.

latter is available on free access. The classification order of the journals for each index was reviewed and the possible correlation between both indicators was evaluated using Spearman’s test. The Journal Citation Reports includes 50 specialized respiratory system journals and the SCImago Journal & Country Rank includes 98. In general, it was found that the top journals occupy similar positions in both classifications, as seen in Table 1, which lists the top 20 journals according to the SJR with their equivalent position in the IF. There was a very high correlation between the indicators for journals in this category (r=0.94; P<.001). Our data reveal that use of the SJR index does not significantly change the classification of respiratory system journals compared to the IF. Moreover, its calculation methods address the main limitations attributed to IF, including nuances, such as citation weighting, that may improve the characterization of the journals. All these aspects, added to the fact that SCImago Journal & Country Rank is free access, lead us to believe that SJR may be at present be considered not only as a complement but also as an alternative to the IF. References