The journal publishes original papers concerning both clinical and basic research on Gastroenterology, including medical and surgical management. Manuscripts should follow the guidelines set out in "Uniform Requirements for Manuscripts Submitted to Biomedical Journals" developed by the International Committee of Medical Journal Editors. The complete document appears at http:/

The Journal publishes the following types of papers.

1. Original research articles

2. Editorials

3. Comprehensive literature Reviews or Invited Reviews

4. Current Views on interesting topics

5. New Methods with a short report of experience with new developments in gastroenterology

6. Case Reports and case series of especially interesting or challenging clinical cases

7. Image of the Month with exceptional or particularly captivating images

8. Clinical Opinions of opinion leaders on a recent important publication

9. Letters to the Editor with comments on articles published in the Journal or brief descriptions or opinions concerning various topics of gastroenterology


Ethical Considerations

A submitted manuscript must be an original contribution not previously published in its current form, must not be under consideration for publication elsewhere, and, if accepted, must not be published elsewhere in similar form, in any language. The International Committee of Medical Journal Editors has provided details of what is and what is not duplicate or redundant publication ( Each person listed as an author is expected to have participated in the study to a significant extent. Although the editors and referees make every effort to ensure the validity of published manuscripts, the final responsibility rests with the authors, not with the Journal, its editors, or the publisher. The Annals of Gastroenterology editors endorse the principles embodied in the Declaration of Helsinki and expect that all investigations involving humans will have been performed in accordance with these principles. It is the author's responsibility to ensure that a patient's anonymity be carefully protected and to verify that any experimental investigation with human subjects reported in the manuscript was performed with informed consent and following all the guidelines for experimental investigation with human subjects required by the institution(s) with which all the authors are affiliated. Do not use patients' names, initials, or hospital numbers, especially in illustrative material. Papers including clinical trials must be accompanied by an approval by the local ethics committee. For animal experimentation reported in the journal, it is expected that investigators will have observed the Interdisciplinary Principles and Guidelines for the Use of Animals in Research, Testing, and Education issued by the New York Academy of Sciences' Adhoc Committee on Animal Research. All human and animal studies must have been approved by the investigator's Institutional review board.

Conflict of interest and funding

Authors are responsible for recognising and disclosing financial and other conflicts of interest that might bias their work. They should acknowledge in the manuscript all financial support for the work and other financial or personal connections to the work.

Public trust in the peer review process and the credibility of published articles depend in part on how well conflict of interest is handled during writing, peer review, and editorial decision making. Conflict of interest exists when an author (or the author's institution), reviewer, or editor has financial or personal relationships that inappropriately influence (bias) his or her actions (such relationships are also known as dual commitments, competing interests, or competing loyalties). These relationships vary from those with negligible potential to those with great potential to influence judgment, and not all relationships represent true conflict of interest. The potential for conflict of interest can exist whether or not an individual believes that the relationship affects his or her scientific judgment. Financial relationships (such as employment, consultancies, stock ownership, honoraria, paid expert testimony) are the most easily identifiable conflicts of interest and the most likely to undermine the credibility of the journal, the authors, and of science itself. However, conflicts can occur for other reasons, such as personal relationships, academic competition, and intellectual passion.

- International Committee of Medical Journal Editors ("Uniform Requirements for Manuscripts Submitted to Biomedical Journals") -- February 2006

Inform Concent

Patients have a right to privacy that should not be infringed without informed consent. Identifying information, including patients' names, initials, or hospital numbers, should not be published in written descriptions, photographs, and pedigrees unless the information is essential for scientific purposes and the patient (or parent or guardian) gives written informed consent for publication. Informed consent for this purpose requires that a patient who is identifiable be shown the manuscript to be published. Authors should identify Individuals who provide writing assistance and disclose the funding source for this assistance.

Identifying details should be omitted if they are not essential. Complete anonymity is difficult to achieve, however, and informed consent should be obtained if there is any doubt. For example, masking the eye region in photographs of patients is inadequate protection of anonymity. If identifying characteristics are altered to protect anonymity, such as in genetic pedigrees, authors should provide assurance that alterations do not distort scientific meaning and editors should so note.

The requirement for informed consent should be included in the journal's instructions for authors. When informed consent has been obtained it should be indicated in the published article.

- International Committee of Medical Journal Editors ("Uniform Requirements for Manuscripts Submitted to Biomedical Journals") -- February 2006

Human and Animal Rights

When reporting experiments on human subjects, authors should indicate whether the procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000 (5). If doubt exists whether the research was conducted in accordance with the Helsinki Declaration, the authors must explain the rationale for their approach, and demonstrate that the institutional review body explicitly approved the doubtful aspects of the study. When reporting experiments on animals, authors should be asked to indicate whether the institutional and national guide for the care and use of laboratory animals was followed.

- International Committee of Medical Journal Editors ("Uniform Requirements for Manuscripts Submitted to Biomedical Journals") -- February 2006


Copyright assignment

Papers are accepted for publication on the understanding that exclusive copyright in the paper is assigned to the Publisher. Authors are asked to sign a copyright assignment (download the file) form after acceptance of their papers.

Preparation of manuscripts

The articles must by typewritten and double spaced. They should include the following sections, each starting on a separate page: Title page, abstract and key words, text, acknowledgements, references, tables and figures. Margins should be not less than 2.5 cm. Pages should be numbered consecutively, beginning with the title page.

Title page

The title page should include: 1) complete manuscript title. 2)A short title which will be used as a “running head” 3) The full name of each author. 4) The departments and institutions in which the work was conducted. 5) Name and address for correspondence, including fax number, telephone number, and e-mail address. 6) Conflict of interest disclosure and declaration of funding sources. 7) Each author's contribution to the following criteria for authorship: conception and design; analysis and interpretation of the data; drafting of the article; critical revision of the article for important intellectual content; final approval of the article.

Abstract and key words

For Original Articles, New Methods, and Case Series submissions, a structured abstract of no more than 250 words should use all of the following headings: Background, Methods, Results and Conclusion. For review articles the abstract page should be replaced by a Summary which must not exceed 200 words. List 3 to 5 key words.


Organize the manuscript into four main headings: Introduction, Materials and Methods, Results, and Discussion. Define abbreviations at first mention in text and in each table and figure.


State the objectives of the study and provide an adequate background, avoiding a detailed literature survey or to describe the results.

Materials and Methods

These should include sufficient information by which to judge the quality of the research. Any paper that is a randomized controlled trial should adhere to the CONSORT guidelines that can be found at: Observational studies should also adhere to Strobe statement ( Diagnostic accuracy studies should follow the Stard statement ( Systematic Reviews and Meta-Analyses should follow the PRISMA statement

Statistical analysis: Follow the guidelines of URM: “Describe statistical methods with enough detail to enable a knowledgeable reader with access to the original data to verify the reported results. When possible, quantify findings and present them with appropriate indicators of measurement error or uncertainty (such as confidence intervals). Avoid relying solely on statistical hypothesis testing, such as P values, which fail to convey important information about effect size. References for the design of the study and statistical methods should be to standard works when possible (with pages stated). Define statistical terms, abbreviations, and most symbols. Specify the computer software used."


These should be presented precisely without discussion of their importance. Do not duplicate information contained in tables and figures.


This should directly relate to the results of the study. Do not provide a general review of the topic. A conclusion at the end this section should be added

Summary Box

For Original Articles a summary box indicating the significance of this study should be included as follows: What is already known about this subject: 3-4 bullet points What are the new findings: 3-4 bullet points


Use only standard abbreviations. Avoid abbreviations in the title and abstract. The full term for which an abbreviation stands should precede its first use in the text unless it is a standard unit of measurement.


Acknowledgements should be made only to those who have made a substantial contribution to the study. Authors are responsible for obtaining written permission from people acknowledged by name in case readers infer their endorsement of data and conclusions.


These should be numbered in the order they appear in the text. They should be assigned Arabic numerals, which should be given in brackets, e.g. [13]. The last names and initials of all authors should be referred to if they are up to six, otherwise only the first three are referred, with et al following. Abbreviations of the titles of the journals are made according to the instructions of the Index Medicus. No periods should be placed at the end of abbreviations of the journal. References to journals are given as follows: Author(s), title of paper, journal abbreviation (in italics), year, volume (in bold) and pages in which the publication is included. References to books are given in the following order: Author(s), title, volume (if more than one), number of publication (if there are others besides the first), publisher, city, year. References to a book chapter: Author(s) of the chapter, title or chapter. In: editor(s), title of book, volume, publication, publisher, city, year and pages in which the chapter appears. Information from manuscripts submitted but not yet accepted should be cited in the text as “Unpublished observations” (in parentheses) The style and punctuation of the references conform to the following examples:

Article: Katsanos KH, Tsianos VE, Maliouki M, Adamidi M, Vagias I, Tsianos EV. Obstruction and pseudo-obstruction in inflammatory bowel disease. Ann Gastroenterol 2010;23:246-253

Book: Sherlock S. Diseases of the liver and biliary system. Blackwell Sci: Oxford; 1989

Contribution to a Book: Radford-Smith, Jewell DP. Cytokines in inflammatory bowel disease. In: Allan R, Rhodes JM, Hanauer SB (editors): Inflammatory bowel diseases. Churchill Livingstone: New York; 1997, pp. 95-100.


These should be typewritten, double-spaced, each one on a separate page and numbered consecutively in Arabic numerals. Tables should include a short but concise title. Vertical and horizontal lines should be avoided in the tables. Place explanatory matter in footnotes, including any non-standard abbreviation. If data from another published or unpublished source are used, obtain permission and acknowledge fully.


Submit each figure as a separate file and in JPEG or TIFF format with a resolution of at least 300 dpi. Number figures consecutively using Arabic numerals. Submit photographs scaled as near to printed size as possible. If magnification is significant, indicate using a bar on the print rather than a magnification factor in the figure legend. If someone appears in a photograph, either s/he must not be identifiable or written permission for use of the photograph must accompany the manuscript. Give each figure a legend containing sufficient information to make the figure intelligible without the reader having to refer to the text. Key all the legends together. If a figure has been published previously, acknowledge the original source and submit written permission from the copyright holder to reproduce it. Authors will be required to pay for the extra cost of printing illustrations in colour. However, there is an option to have their images in color in the electronic version of their manuscript and in grey scale in the printed version. The Editors could reward the authors by publishing each month the best figure in color free of charge in the cover page.

Supplemental materials

Submissions may be accompanied by supplemental materials such as videos or additional color figures posted to the electronic version of the journal; such materials also will be subject to peer review. Videos are also welcome and should be in .mov, .avi, or .mpeg format. They should be offered as two different files, one for viewing at lower speed connections, and of low resolution; and one for higher speed connections, of high resolution.

Categories of the manuscripts

Original Papers

The maximum length of the main text is 3,500 words


These manuscripts are accepted only upon invitation from the Editorial Board. The maximum length is 1500 words


These manuscripts with or without invitation from the Editorial Board are subject to peer review. The maximum length of the main text is 5,000 words.

Case reports

Case reports should not exceed 1000 words and should not include more than ten references. Case reports should ideally include a short introduction, the case presentation and a brief discussion, the latter highlighting key lessons from the case

Image of the Month

Only exceptional or particularly captivating images should be submitted for publication. Submissions for this topic should include no more than 2 Figures. The legend text should not exceed 250 words, and 3 references. No more than 4 authors may appear in the author list.


Clinical Opinions

Short (up to 1000 words), focused and opinionated articles on any subject within the Journal's scope. These articles are commentaries on a recent important publication and they are often written by opinion leaders invited by the Editorial Board


Letters to the Editor

Correspondence concerning articles published in the journal will be considered for publication. They should be submitted within 4 weeks of the appearance of the original item and should not exceed 300 words. Such letters will be passed to the authors of the original paper, who will be offered an opportunity to reply. Letters of general interest, up to 500 words long, will be peer reviewed if they contain original data. They could have up to 4 authors and may contain one table or one figure and up to 10 references.


Submission of articles

Cover letter

A submission letter to the Editor should accompany the manuscript. It should contain a statement of the authors that:

  • The manuscript has not been published previously (except in the form of an abstract in a congress), and is not under consideration (in whole or in part) for publication elsewhere.
  • The manuscript is approved by all Authors.
  • In case of acceptance of the manuscript the copyright is transferred to Annals of Gastroenterology.


Submission to Annals of Gastroenterology proceeds totally on-line at

First-time users: Please click the Register button from the main menu and enter the requested information. On successful registration, you will be sent an e-mail indicating your user name and password.

Authors: Please click the login button from the menu at the top of the page and log in to the system as an Author. Submit your manuscript according to the author instructions. You will be able to track the progress of your manuscript through the system.


Galley proofs

As soon as a manuscript has been edited and typeset, a copy of the galley proof will be sent to the author. Timely correction of the galley proof will be sent to the author. Timely correction of the galley proof is essential to secure speedy publication of the article. At this stage, authors may make only minor corrections. At this point the author may order reprints, which are charged according to the number of reprints and the number of pages of the article.

Editorial Office

The Editor, Annals of Gastroenterology, 67, Demokratias Ave., GR 154 51 Athens, Greece E-mail: