Researchers based in less economically developed countries are able to apply for waivers and discounts to publish in this journal. Corresponding authors based in low-income countries, as categorized by the World Bank, may be eligible for a full waiver of the processing fee. Currently, this journal has waiver policy for these countries: Zimbabwe, Uganda, Iran and Nigeria.

Discretionary waivers will be considered on a case-by-case basis at the point of submission. Requests made during the review process or after acceptance will not be considered. To ensure the integrity of peer review, our team of editors and reviewers receive no information about payments at any stage.