Writing scientific paper and bibliographic research

PubMed
database with medical literature

Hardin Library for the Health Sciences, University of Iowa
addresses to the best sites of different medical areas

Emory MedWeb Community
provides a detailed list of institutions and governmental associations, description of diseases, chemical compounds with pharmacological activity, etc.

Current Controlled Trials
enlists current trial, specifying titles, inclusion and exclusion criteria , primary and secondary end-points

Dana Medical Library, University of Vermont
provides a list of free access journals, allows the search of free full text articles divided in categories (review, scientific etc.), provides the links to the best health sciences databases and to a number of dictionaries and photo galleries

Stanford University Libraries, HighWire Press
provides lists of free access articles, and permits tailored literature search