1. Address information (postal address, e-mail address, telephone number)
2. The author's declaration that the article has not been previously published
3. Declaration of conflict of interest
4. Number of the approval of the appropriate Ethics Committee (if required)
5. Approval by the head of the institution, center, or clinic that the article may be published (if required).
   
   Existing conflict of interest does not affect acceptance for publication. However, the information will be included in the text of the article.
   
   The date of receipt by the editorial office of all the material making up the article is considered as the date of receipt of the article, of which the author shall be informed. Each article will be reviewed by the editorial board as well as by independent referees designated by the editorial office. 
   

• the title of the article
• the name(s) and surname(s) of the author(s)
• the names of the institutions where the article originated and the address of the author responsible for correspondence, which must be the exact postal address as well as an email address
• an abstract of the article (from 200 to 250 words)
• key words
• a list of abbreviations and other information (where necessary)
• the main body of the article, divided into suitable sections of suitable size
• a list of references

4.2. Original papers:

• the title of the article
• the name(s) and surname(s) of the author(s)
• the author’s contribution to the paper: A – study design, B – data collection, C – statistical analysis, D – data interpretation, E – manuscript preparation, F – literature search, G – funds collection
• the names of the institutions where the article originated and the address of the author responsible for correspondence, which must be the exact postal address as well as an email address
• an abstract of the article (from 200 to 250 words) divided into four paragraphs: Introduction, Materials and Methods, Results, and Discussion
• key words
• a list of abbreviations and other information (where necessary)
• the main body of the article, divided into Introduction, Materials and Methods, Results, Discussion, Acknowledgments, and References

The locations of tables and figures must be marked in the margin of the article.

Tables, numbered with Arabic numerals and provided with captions, must appear on separate sheets.

Drawings, graphs, and photographs (may be in color) must be numbered as figures and attached separately to the article. Graphics material must contain, on the back, the author's name, the number of the figure, and the designation "top". The figure caption must be provided on a separate page. The quality of the figures must assure their legibility on publication.

If graphics material is a reproduction from other works, permission must be obtained for its reproduction from the respective publication and delivered to our editorial office.

References: references in the text to the References section at the end are to be indicated with numbers enclosed in square brackets. The References section (exclusively containing items cited in the main body and not having the character of textbooks) must be arranged in alphabetic order. The References list must be presented as follows:

1. article in a periodical: surname(s) and first initial(s) of author(s), title of article, abbreviated title of the periodical (according to the Index Medicus), year; volume: first and last page numbers
   example: [1] Kilby J.M., Eron J.J.: Novel therapies based on mechanisms of HIV-1cell entry. N. Engl. J. Med., 2003; 348: 2228-2238
    
2. chapter of a book: surname(s) and first initial(s) of the author(s), title of article, title of book, surname(s) and first initial(s) of editor(s), name and seat of publisher, year of publication, first and last page numbers of the article
   example: [2] Rima B.K.: Mumps virus. In: Encyclopedia of Virology, vol. 2, eds.: R.G. Webster, A. Granoff. Academic Press, London 1994, 876-883
    
3. book: surname(s) and first initial(s) of author(s), title of book, name and seat of publisher, year of publication.
   example: [3] Fuller G.M., Shields D.: Podstawy molekularne biologii komórki. Aspekty medyczne. Wydawnictwo Lekarskie PZWL, Warszawa 2000
    
4. Internet source: surname(s) and first initial(s) of author(s), title of article, Internet address, date the file was viewed. In the case of an anonymous author, the name of the Internet page must be given, its Internet address, and the date the file was viewed
   example: [4] Methicillin resistant Staphylococcus aureus. http://www.cdc.gov/ncidod/hip/Aresist/mrsafaq.htm (12.10.2003)
    

1. text: any version of Microsoft Word in document (doc, docx) or rich (rtf) format
2. figures: graphics Word files (doc, docx), PowerPoint (ppt, pptx), Excel (xls, xlsx), Corel Draw format (cdr), as well as gif, jpeg, tiff, and bmp graphics file formats. When using formats which employ data compression, such as jpeg, one must assure that a suitable quality is maintained. Each figure must be contained in its own separate file.