De-duplication of database search results for systematic reviews in EndNote

Just published in the Journal of the Medical Library Association (JMLA)

Bramer, W. M., Giustini, D., de Jonge, G. B., Holland, L., & Bekhuis, T. (2016). De-duplication of database search results for systematic reviews in EndNote. J Med Libr Assoc, 104(3), 240-243. doi:10.3163/1536-5050.104.3.014


The de-duplication method presented in this article was previously described in a brief conference paper [1]. The method consists of three stages.

  1. Settings are changed for the displayed fields, and custom filters and export formats are installed.
  2. Several databases are imported into a temporary library and exported in an adapted format before being imported for de-duplication.
  3. Several subsequent changes in the settings for fields are used to detect duplicates, followed by removal of probable duplicates.

In this article, we describe this method in detail for EndNote, a popular reference manager.

[1] Bramer WM, Holland L, Mollema J, Hannon T, Bekhuis T. Removing duplicates in retrieval sets from electronic databases: comparing the efficiency and accuracy of the Bramer-method with other methods and software packages. 2014 Jun 11–13; Proceedings of the 14th European Association for Health Information and Libraries (EAHIL) Conference, 57-9; Rome, Italy.