1. MEDLINE; ЕBM reviews-Cochranedatabase of SystematicReviews;Journals@OvidFullText;Books@Ovid http://ovidsp.tx.ovid.com
  2. MEDLINE Complete https://search.ebscohost.com/login.asp
  3. Web of Science – http://www.webofknowledge.com (ThomsonReuters)
  4. Science Direct®- http://www.sciencedirect.com (Elsevier)
  5. Scopus® – http://www.scopus.com (Elsevier)