U.S.Food&Drug Administration

The electronic Medicines Compendium(eMC)

Prescriber's Digital Reference

PubMed

World Health Organization

OncoLink

Centers for Diseases Control and Prevention (CDC)

Doctor's Guide to Internet

Healthcare and Medical Software

IAPAC

Healio

Nature

THE BODY

ASHP

American Association of Colleges of Pharmacy

U.S. Pharmacopoeia