Science Citation Index-Expanded (SciSearch®), Journal Citation Reports/Science Edition, BIOSIS, BIOSIS Previews, BIOSIS Reviews Reports and Meetings, MEDLINE/PubMed/Index Medicus, Scopus, EMBASE/Excerpta Medica, Chemical Abstracts, ProQuest, BIOBASE, MediaFinder®-Standard Periodical Directory, Genamics JournalSeek, PubsHub and J-Gate.