The Journal of Peritoneum (and other serosal surfaces) (JoPER) is a quarterly open access, peer-reviewed online journal that covers all aspects of clinical and basic research related to either healthy, either diseased peritoneum (and other serosal surfaces, like pericardium and pleura) and its allied subjects. Peritoneum is a word derived from Greek (peritonaion) via Latin (peritonaeum), that results from the merging of peri- "around" (lat. peri-) + teinein "to stretch" (lat. tenet), meaning thus “stretched around” or “stretched over”. Although peritoneum is present in some invertebrates, such as annelids, typically is the serous membrane that forms the internal covering of the abdominal cavity or coelom in amniotes, wrapping most of the intra-abdominal (or coelomic) organs. Although the peritoneum is composed only of a layer of mesothelium supported by a thin stratum of connective tissue, it is involved in many intrabdominal disorders and is an important way of treatment (like, for example, intraperitoneal chemotherapy and peritoneal dialysis). Thus peritoneum spans a wide range of disciplines and interests, including either surgical and medical specialties, but even anatomy, embryology, histology, physiology and basic sciences. The same can be told for other serosal surfaces of human body, like pericardium and pleura. As such JoPER aims to provide a platform for surgeons and physicians to publish their researches and rapidly exchange ideas and findings with the common topic of the peritoneum (and the other serosal surfaces). Areas of interest include, but are not limited to: oncology, inflammatory diseases and adhesions, septic diseases, gynecological diseases and endometriosis. The online presence of JoPER, as well as it's open access policy ensures that the articles published in the journal are highly visible and reach a wide audience, whilst immediate publication on acceptance ensures all findings are disseminated as quickly as possible.

Open Access Policy
An Open Access Publication is one that meets the following two conditions:
1. The author(s) and copyright holder(s) grant(s) to all users a free, irrevocable, worldwide, perpetual right of access to, and a license to copy, use, distribute, transmit and display the work publicly and to make and distribute derivative works, in any digital medium for any responsible purpose, subject to proper attribution of authorship, as well as the right to make small numbers of printed copies for their personal use.
2. A complete version of the work and all supplemental materials, including a copy of the permission as stated above, in a suitable standard electronic format is deposited immediately upon initial publication in at least one online repository that is supported by an academic institution, scholarly society, government agency, or other well-established organization that seeks to enable open access, unrestricted distribution, interoperability, and long-term archiving.

Authors who publish with this journal agree to the following terms: 1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal. 2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. 3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.

Peer review policy
All manuscripts submitted to our journal are critically assessed by external and/or in-house experts in accordance with the principles of peer review (http://www.icmje.org/#peer), which is fundamental to the scientific publication process and the dissemination of sound science. Each paper is first assigned by the Editors to an appropriate Associate Editor who has knowledge of the field discussed in the manuscript. The first step of manuscript selection takes place entirely in-house and has two major objectives: i) to establish the article’s appropriateness for our journals’ readership; ii) to define the manuscript’s priority ranking relative to other manuscripts under consideration, since the number of papers that the journal receives is much greater than it can publish. If a manuscript does not receive a sufficiently high priority score to warrant publication, the editors will proceed to a quick rejection. The remaining articles are reviewed by at least two different external referees (second step or classical peer review). Manuscripts should be prepared according to the Uniform Requirements established by the International Committee of Medical Journal Editors (ICMJE) (http://www.icmje.org/#prepare).

Authorship: all persons designated as authors should qualify for authorship according to the ICMJE criteria (http://www.icmje.org/ethical_1author.html). Each author should have participated sufficiently in the work to take public responsibility for the content. Authorship credit should only be based on substantial contributions to i) conception and design, or analysis and interpretation of data; and to ii) drafting the article or revising it critically for important intellectual content; and on iii) final approval of the version to be published. These three conditions must all be met. Participation solely in the acquisition of funding or the collection of data does not justify authorship. General supervision of the research group is not sufficient for authorship. Any part of an article critical to its main conclusions must be the responsibility of at least one author. Authors should provide a brief description of their individual contributions.

Obligation to Register Clinical Trials (http://www.icmje.org/#clin_trials): the ICMJE believes that it is important to foster a comprehensive, publicly available database of clinical trials. The ICMJE defines a clinical trial as any research project that prospectively assigns human subjects to intervention or concurrent comparison or control groups to study the cause-and-effect relationship between a medical intervention and a health outcome. Medical interventions include drugs, surgical procedures, devices, behavioral treatments, process-of-care changes, etc. Our journals require, as a condition of consideration for publication, registration in a public trials registry. The journal considers a trial for publication only if it has been registered before the enrollment of the first patient. The journal does not advocate one particular registry, but requires authors to register their trial in a registry that meets several criteria. The registry must be accessible to the public at no charge. It must be open to all prospective registrants and managed by a non-profit organization. There must be a mechanism to ensure the validity of the registration data, and the registry should be electronically searchable. An acceptable registry must include a minimum of data elements (http://www.icmje.org/#clin_trials). For example, ClinicalTrials.gov (http://www.clinicaltrials.gov), sponsored by the United States National Library of Medicine, meets these requirements.

Protection of Human Subjects and Animals in Research: when reporting experiments on human subjects, authors should indicate whether the procedures followed were in accordance with the ethical standards of the committee responsible for human experimentation (institutional and national) and with the Helsinki Declaration of 1975 (as revised in 2008). In particular, PAGEPress adopts the WAME policy on Ethics in Research (http://www.wame.org). Documented review and approval from a formally constituted review board (Institutional Review Board - IRB - or Ethics committee) is required for all studies (prospective or retrospective) involving people, medical records, and human tissues. When reporting experiments on animals, authors will be asked to indicate whether the institutional and national guide for the care and use of laboratory animals was followed.