Scientific Letters is an international peer-reviewed, fully Open Access journal, free of charges, providing a forum for original research and critical contributions from all areas of biology and medicine, in the form of original and review articles. Publication is continuous, with papers released online shortly after acceptance. All papers are published into a single annual (January-December) volume. Scientific Letters accepts works of the highest standards and ensures their wide dissemination and free access to all, without restriction. The published works are under the Creative Commons Attribution (CC BY) license, available to all, as long as the author and original source are properly cited. IUCS-CESPU, the University Institute of Health Sciences, is the publisher of the open-access Scientific Letters journal ISSN (2795-5117, online).