Search language mistakes.

Within reproducible searches, illustrates the percent of articles with errors in the following categories: Use of MeSH or Emtree headings (only searches with headings were assessed), Inclusion of irrelevant MeSH or Emtree headings (only searches with headings were assessed), Missing natural language variants, Missing spelling variants (such as pediatric/paediatric), Inclusion of irrelevant natural language variants, Errors in the use of truncation (only searches with truncation were assessed), Inclusion of unwarranted limits (date, language, etc.).