BioMed Central: an STM (Science, Technology and Medicine) publisher of 220 open access, online, peer-reviewed journals.
ChemIDplus: Dictionary of over 370,000 chemicals (names, synonyms, and structures). Includes links to NLM and other databases and resources.
ClinicalTrials.gov: "a Web-based resource that provides patients, their family members, health care professionals, researchers, and the public with easy access to information on publicly and privately supported clinical studies on a wide range of diseases and conditions"
Cochrane Methodology Register: "a database of studies relevant to the methods of systematic reviews of healthcare and social interventions."
Drugs and Lactation Database (LactMed): "A peer-reviewed and fully referenced database of drugs to which breastfeeding mothers may be exposed. Among the data included are maternal and infant levels of drugs, possible effects on breastfed infants and on lactation, and alternate drugs to consider."
HighWire medical and science journals
Hindawi open-access medical and science journals
International Classification of Diseases: "the standard diagnostic tool for epidemiology, health management and clinical purposes."
International Classification of Diseases, Clinical Modification: "a clinical modification of the classification [International Classification of Diseases] for morbidity purposes.
MedlinePlus: "the National Institutes of Health's Web site for patients and their families and friends."
PubMed: "biomedical literature from MEDLINE, life science journals, and online books."