Health, Economic, and Social Impacts of Substandard and Falsified Medicines in Low- and Middle-Income Countries: A Systematic Review of Methodological Approaches.

"Financial support: This project was funded by National Institute for Health Research (Grant no. 131145)."

"A preliminary search was conducted in early March 2021 to find medical subject headings entry terms associated with “substandard and falsified medicines” and “low-middle-income countries.” After this, the full review started in late March 2021 and was updated in June 2022. Details on the search strategy are presented in Supplemental Tables 1–4. The Ovid search engine was used to search the Medline, Embase, Econlit, and Global Health databases. Scopus, Web of Science, Open Grey Literature Database (http://www.opengrey.eu/), and WHO Essential Medicines and Health Product Information Portal were also searched., Because we use open-source registered guidelines for systematic literature reviews, the specific protocol for this systematic review was not registered."