Role of the circulatory interleukin-6 in the pathogenesis of gliomas: A systematic review

Figure 2 Electronic search. This review was based on a search of electronic databases using the keywords shown. The resulting 953 articles were screened and assessed by language and three were excluded. The remaining 950 articles were again screened by title and 865 were excluded. The 85 studies were critically reviewed and 10 were duplicates, systematic reviews or meta-analyses and these were excluded. The resultant 75 studies were further divided into two: five studies were included in this mini literature review on the basis of inclusion criteria, and 70 studies based on in vivo and/or in vitro and/or genetic and/or immunohistochemistry methods were chosen as supporting articles.