Erratum to: A hybrid keyword and patent class methodology for selecting relevant sets of patents for a technological field

In the original publication of the article, the data in Table 6 ‘‘Comparison of the different search methods including the adjusted HKC method’’ size and relevancy percentage of the cell in row ‘‘Electric capacitor’’ and column ‘‘Classification selection’’ has been published incorrectly as 9,472 (2 %). It should read as 69,277 (7 %). The correct version of Table 6 is provided below