Every year, a limited number of supplements with abstracts of presentations held at professional or scientific meetings are published in the professional journal of the Croatian Medical Association, “Liječnički vjesnik”. Generally, this includes a maximum of 6 supplements per year (in addition to the supplement of the Student Section of the Croatian Medical Association), regardless of whether the supplement is in printed or electronic form. Only abstracts written in accordance with the rules of the “Liječnički vjesnik” journal shall be published in the supplements. All parties interested in publishing a supplement in the “Liječnički vjesnik” journal (professional societies of the Croatian Medical Association, organizers of professional/scientific meetings) should express their interest in publishing a supplement at least 6 months before the desired date. The final decision on whether a supplement will be published is made by the Editorial Board of the “Liječnički vjesnik” journal. The quality of supplements is assessed by the Editor for Supplements who is also a member of the Editorial Board of the “Liječnički vjesnik” journal. The costs of supplement publishing shall be covered by the organizer of the meeting at which the abstracts are presented. The abstract must be written in accordance with the ICMJE Recommendations. Abstracts written in Croatian or English can be published in the supplement of the “Liječnički vjesnik” journal. The abstract that is to be used in the supplement can contain a maximum of 2700 characters. The abstract must be structured, which means that it must include at least the following subheadings: objective, methods, results, conclusions. A maximum of one table can be attached to the abstract. The summary must not contain any abbreviations or references. The title of the abstract must be in the same language as the language in which the abstract is written, and the names and surnames of the authors should be listed below the title. Below that part, the institutions where the authors work should be listed, marked with the appropriate number in superscript as indicated next to their surnames, as well as the e-mail addresses of the corresponding authors. The academic titles of the authors shall not be stated. Below the abstract, authors should list four to six keywords or short terms in Croatian and English to assist in the searching and indexing. Terms from the Medical Subject Headings (MeSH) list should be used for keywords. General, plural and multi-word concepts (e.g. use of “and”, “or”) should be avoided. The instructions for writing abstracts are equally valid for writing abstracts in Croatian and English. Furthermore, the instructions for writing abstracts are equally valid for writing abstracts that will be published in printed and/or electronic form. The authors of the abstracts are responsible for the linguistic correctness of the manuscript, unless otherwise agreed with the Editor.