The goal of the Yonsei Medical Journal (YMJ) is to publish high quality manuscripts dedicated to clinical or basic research. Any authors affiliated with an accredited biomedical institution may submit manuscripts of original articles, review articles, case reports, brief communications, and letters to the Editor. Manuscripts are received with the understanding that they are not under simultaneous consideration by any other publications, and that the authors realize that the identities of the reviewers are kept confidential. The Editors reserve the right to make corrections, both literary and technical, to the papers. 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 follows all guidelines for experimental investigation with human subjects required by the institution(s) with which all the authors are affiliated. YMJ is published bimonthly and issuing dates are the first days of January, March, May, July, September, and November. The copyright of published manuscripts is held by the YMJ. The agreement of copyright transfer from all the authors should be sent with the original manuscript submission. A copyright transfer form is available at the journal homepage.

Any potential conflicts of interest must be disclosed in this section. If there are no potential financial conflicts of interest, the following statement should be added: “The authors have no financial conflicts of interest.”

All new manuscripts should be submitted directly to: In-Hong Choi, M.D., Ph.D., Editor-in-Chief, using the online submission system: http://journal.eymj.org
Acceptance of manuscripts is based on many factors, including the importance, originality, and priority of the research. The Editor-in-Chief and an Associate Editor generally review manuscripts. Then the selected manuscripts are reviewed by at least two external peer reviewers, and when required, a biostatistician. Upon completion of the review, authors will receive notification of the Editor's decision by e-mail with comments offered by the reviewers. The author(s) can recommend up to 5 candidates to review the manuscript.

Authors should refer to "Uniform Requirements for Manuscripts Submitted to Biomedical Journals" (http://www.icmje.org). On the cover letter, authors should make a statement about the originality of their work and disclose previous presentations, reports, or publications that contain any material that appears in the manuscript. If there is a similar or supplemental publication, the authors should provide a copy for the Editors' review. Manuscripts should be written in double space throughout.

Review articles are usually solicited by the Editor-in- Chief. However, unsolicited Reviews will be also considered. Authors should contact the Editor-in-Chief in advance to determine the appropriateness of their Review Articles for publication. Unsolicited Reviews will undergo peer review. An Abstract is required whereas Materials and Methods section and a Results section are not required. The length of Review Articles is limited to 5,000 - 8,000 words with a maximum of 100 references. Also, there should be no more than 3 authors.

Manuscripts should begin with the title page followed by an abstract; a list of key words; an introduction; materials and methods; results; a discussion; tables and/or illustrations; and references.

References should be numbered consecutively in the order in which they are first mentioned in the text, with numbers as unparenthesized superscripts after any closing punctuation. They should be listed on a separate document under the heading "REFERENCES," and double-spaced. Reference format should conform to that set forth in "Uniform Requirements for Manuscripts Submitted to Biomedical Journals. 5th ed." (JAMA 1997;277:927-34). Titles of journals should be abbreviated according to the Index Medicus style. When referencing from an abstract, editorial, or published letter, it must be identified as such in parentheses at the end of the reference. When a reference is a personal communication, it should be included in parentheses in the body of the text, and not cited in the reference list.

• Journal articles: List all authors when six or less; when seven or more, list the first six and add et al.
  Vega KJ, Pina I, Krevsky B. Heart transplantation is associated with an increased risk for pancreatobiliary disease. Ann Intern Med 1996;124:980-3.
• Book: Ringsven MK, Bond D. Gerontology and leader-ship skills for nurse. 2nd ed. Albany (NY): Delmar Publishers; 1996.
• Book chapter: Phillips SJ, Whisnant JP. Hypertension and stroke. In: Laragh JH, Brenner BM, editors. Hypertension: pathophysiology, diagnosis, and management. 2nd ed. New York: Raven Press; 1995. p.465-78.

Tables should fit within a single page. The Table's legend may include any pertinent notes and must include definitions of all abbreviations and acronyms that have been used in the Table. For footnotes, the following symbols should be used in this sequence: *, †, ‡, §,∥, ¶, **, ††, ‡‡, etc. Authors are obligated to indicate the significance of their observations by appropriate statistical analysis.

Figures must be cited consecutively using Arabic numerals. The recommended fonts within the figures are Helvetica or Arial. Figures which are drawn or photographed professionally should be sent as JPG(JPEG) file. Authors should review the images of such files on a computer screen to be sure they meet their own quality standard. The complete expense of reproducing color photographs will be charged to the author.

Typed legends that use double-spacing should start on a separate page with Arabic numerals corresponding to the Tables or Illustrations. When symbols, arrows, numbers, or letters are used to identify parts of the Tables or Illustrations, they should be individually identified and explained clearly in the legend.

Authors should limit the use of abbreviations to an absolute minimum. Abbreviations are not to be used in titles. Abstracts may contain abbreviations for terms mentioned many times in the abstract section, but each term must be identified the first time it is mentioned.

Measurements of length, height, weight, and volume should be reported in metric units (meter, kilogram, or liter) or their decimal multiples. Temperature should be in degrees Celsius. Authors must consult the information for authors for the particular journal and should report laboratory information in both the local and International System of Units (SI).

The brief communication should not exceed 2,000 words excluding the Abstract, References, and Figure/Table Legends. No subdivisions such as the Introduction, Materials and Methods, Results, and Discussion are required. The case report should consist of an Abstract, Key words, Introduction, Case Report, Discussion and References (not more than 20). The case report should not exceed 1,000 words excluding the Abstract, References, and Figure/Table Legends with less than 9 authors, and should include no more than 3 tables or figures. The abstract should be concise and less than 250 words. It is not necessary to have a fully structured abstract for brief communications or case reports. Letter to the editor should not exceed 750 words with less than 5 authors and should include no more than 1 table or figure.

If any portion of a manuscript has been previously published, the original source must be acknowledged, and the written permission from the copyright holder to reproduce the material must be submitted.

The reprint order form must be returned along with the corrected galley proofs. Purchased reprints are normally shipped 3 weeks after publication of the journal.

Authors will be invoiced by the publisher at the rate per printed pages ($200/1-5 pages, $250/6-10 pages and $300/more than 11 pages) after publication. Invited review articles are exempt from page charges..

All correspondences, business communications and manuscripts should be mailed to:

Yonsei Medical Journal
Yonsei University College of Medicine
250 Seongsan-ro, Seodaemun-gu, Seoul 120-752, Korea
Office Tel: 82-2-2228-2034, Fax: 82-2-393-4945
E-mail: ymj@yuhs.ac