CDC

http://www.cdc.gov/mmwr/

The new England journal of medicine

http://content.nejm.org/

Journal of medicine

 http://www.ccspublishing.com/j_med.htm

British Medical Journal

http://www.bmj.com/

American JM

http://www.amjmed.com/

Diabetes

http://www.diabetes.org.uk/

journal of toxicology

http://www.hindawi.com/journals/jt/contents.html

Cepis

http://www.bvsde.paho.org/sde/ops-sde/bvsde.shtml

Texas Heart Institute Journals:

http://www.pubmedcentral.nih.gov/tocrender.fcgi?journal=92&action=archive

QJM: Oxford journals:

http://qjmed.oxfordjournals.org/

Biblioteca de Revistas Electrónicas:

http://www.campusvirtual-hgm.net/ceids/?q=node/80

Directorio de Medical  Journal:

http://dir.yahoo.com/Health/Medicine/Journals/

Journal of Cardiology:

http://www.hrt.org/

Centro Toxicologia Nicaragua

http://www.civatox.com/

Chest Medicine:

http://www.priory.com/chest.htm

Journal of Hypertension:

  http://journals.lww.com/jhypertension/pages/default.aspx

American College of Cardiology:

http://www.cardiosource.com/index.asp

World Health Organization:

http://www.who.int/en/http://www.who.int/en/