PubMed - PubMed is one of the most popular and well-used databases to search for medical, health, bioinformatics, and genetics literature; which includes MEDLINE.
SCOPUS - International multi-disciplinary indexing & abstracting database for scientific, medical, technical, social sciences and arts and humanities.
ClinicalKey- ClinicalKey has comprehensive medical information (evidence-based reference, research articles, books, practice guidelines, and multimedia) available in one convenient resource with an easy search.