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Systematic Reviews for the Health Sciences: Searching Grey Literature

Grey Literature: Overview

Types of grey literature:

  • Include, but not limited to: abstracts, bibliographies, book chapters, clinical trials, conference proceedings, dissertations and theses, government reports, newsletters, preprints, regulatory documentation

Benefits of including grey literature:

  • Current perspective, minimizes time-lag bias in publishing
  • Minimizes positive publication bias
  • Minimize geographical bias
  • Minimize gaps in published literature

Potential disadvantages of grey literature:

  • Lack of peer review
  • Potentially less reliable or of questionable quality
  • Potential bias of purpose
  • Time-consuming

Grey Literature

Agencies and Organizations

Clinical Trails

Dissertations and Theses

Conference Proceedings and other Relevant Information

International Databases