When researching for a topic, the key is to identify an appropriate database to start with. The following is a list of key databases related to biomedical research.
CINAHL (Cumulative Index to Nursing and Allied Health Literature) covers journals, books and other materials in nursing and the allied health fields. Comprehensive Index to Nursing and Allied Health Literature.
PubMed, a service of the National Library of Medicine, includes over 19 million citations for biomedical articles back to the 1940's.
Scopus is a multidisciplinary abstract and citation database of peer-reviewed journal articles, books, and conference proceedings. In addition to publication information, Scopus provides author, publication, and journal impact metrics as well as free author profiles.