The P.I.E. member/adherent confirms that he/she will only deals with peer-reviewed journals. P.I.E. understands that certain articles may require internal peer-reviewing only (e.g. editorials, meeting reports and personal opinions) but recognises that the majority of the articles (i.e. original research studies, research studies, critical reviewers, reviews, case reports, case studies, case series and short communications) require both internal and external peer-reviewing prior to publishing.

Peer-reviewers are usually the ones that are giving the arguments on whether a submitted manuscript should be published or not. They evaluate the technical and historical accuracy of the written text if it is required but they are also analysing the presentation, the writing style and the grammatical correctness of the text.