Ask the Medical Expert
   Answers to medical related queries searchable from archives of the weekly column.
   http://www.medinfosource.com/expert

AskDrWalker
   Resources and links to medical information. Includes medical databases, medical search engines, diseases and conditions and useful links for health professionals and patients.
   http://www.askdrwalker.com

Best Evidence Topics
   Access to evidence-based medicine topics. Includes a searchable database.
   http://www.bestbets.org/

Building Better Health
   Medical and healthcare information on disease and health improvement topics. Includes medical news, clinical research and newsletters.
   http://www.buildingbetterhealth.com

CDC Health Topics A to Z
   A listing of disease and health topics from the Center for Disease Control and Prevention in the United States.
   http://www.cdc.gov/az.do

Centre for Medical Web Research
   A virtual centre for researching medical questions on the internet.
   http://www.cmwr.org/

DiagnosisHealth.com
   An online forum discussing various medical topics.
   http://www.diagnosishealth.com/

DiagnosisHeart.com
   Information on heart disease with surgical data and related resources.
   http://www.diagnosisheart.com/

Disease Conditions and Information
   A reference guide for about 100 disease and health conditions in an alphabetical listing.
   http://www.medindia.net/Patients/PatientInfo/Home.asp

DocMD.com
   Provides links to free medical and medically-related sites.
   http://docmd.com

Doctor NDTV
   Information on a variety of health issues from medical experts. Includes FAQ.
   http://www.doctorndtv.com

Globalrph
   Provides drug information, intravenous drug dilution standards and online clinical dosing calculators for health care professionals.
   http://www.globalrph.com

Harrison's Online
   Regularly updated online version of the medical textbook. Subscription required with free 4-week trial.
   http://www.harrisonsonline.com/

Health Information Library
   Alphabetical listing of health information topics by the Carle Clinic and Hospital.
   http://www.carle.com/HealthGate/default.asp?id=PatientReports

Healthsites UK
   A portal to medical and health information for patients and doctors. Access medical and NHS healthcare sites plus news, advice and complementary therapy resources.
   http://www.healthsites.co.uk/

Library of the National Medical Society
   Links to various journals, online diagnosis, medical textbooks and atlases. Subscription required.
   http://www.medical-library.org/

Longevity Healthy Aging Research Group
   Information from this Canadian organisation on getting older and staying healthy.
   http://www.longevity.ca/

MD Consult
   Includes reference books, journal search, practice guidelines, patient education and drug information. Subscription required, free trial period.
   http://www.mdconsult.com

MedCalc
   A comprehensive collection of online clinical calculators. Includes ABG, GFR, Fluids and BMI calculations and interpretations.
   http://www.medcalc.com

MedConnect
   Information services with a clinical and practical focus for physicians and other health care professionals.
   http://www.medconnect.com/

MedPix
   Database of medical images including radiology, pathology, and dermatology. Case of the Week with CME for physicians and CNE for nurses.
   http://rad.usuhs.mil/medpix/medpix.html?mode=default#top

Medical Knowledge Base
   Offers discussion forums on topics like cancer, AIDS, arthritis, hepatitis, healthy nutrition and motivation.
   http://www.medkb.com

Medics Travel
   Lists hospitals, charities, NGOs and recruitment agencies around the world to help doctors, nurses and medical students plan work and electives overseas.
   http://www.medicstravel.co.uk

Mediresource
   Information on diseases and conditions, support groups and drug information. Primarily patient-oriented.
   http://www.mediresource.com

MerckMedicus
   Links to health resources for patients, professionals and an online medical library.
   http://merckmedicus.com

My Body
   Interactive symptom checker, includes details of some possible causes.
   http://www.mybody.ie

NCEMI: Common Simple Emergencies
   An online manual with detailed instructions and illustrations on how to treat various everyday medical emergencies.
   http://www.ncemi.org/cse/contents.htm

OHSU Health
   Information for patients and clinicians on aspects of healthcare. Includes an index of health topics.
   http://www.ohsuhealth.com/

Physicians Online
   Provides physicians with free access to core services, including MEDLINE, email, private physician discussion groups, full text medical news articles, financial news and stock quote services. Membership required.
   http://www.po.com/

PolyMedicine.com
   Clinicians review electronic medical information resources available in any of the following media: browsable WWW sites, downloadable datasets and software or CD-ROMS.
   http://www.polymedicine.com

Predictonline
   A testing and awareness site to provide the public and healthcare provider with medical information on various medical conditions.
   http://www.predictonline.com

PreventDisease.com
   A patient-oriented portal for up-to-date health information on fitness, lifestyle, nutrition and health tools.
   http://preventdisease.com/

South African Health Information
   Reviewed, evidence-based health information based on the South African health system.
   http://www.sahealthinfo.org

Talk Medical
   Offers information on diseases, disorders, medications, parenting, and pregnancy. Also contains a searchable medical dictionary.
   http://www.talkmedical.com

The Doctors Page
   Links to patient education materials, medical reference sites and medical humor.
   http://www.doctorspage.net

The Homeless Handbook
   An online manual designed to assist support workers of homeless and similarly disadvantaged people who find themselves in medically challenging situations.
   http://www.infoxchange.net.au/hhb/index.html

The Merck Manual
   Online version of The Merck Manual of Diagnosis and Therapy.
   http://www.merck.com/pubs/mmanual/

TheMediweb
   Provides a medical dictionary of health information for research and education for health care professionals, academics and the general public.
   http://www.themediweb.net

Virtual Naval Hospital
   A digital library designed to help primary care providers and to help patients associated with naval medical issues. A service of the U.S. Navy Bureau of Medicine and Surgery.
   http://www.vnh.org

Virtual Pediatric Hospital
   A digital health sciences library at the University of Iowa for health care providers and patients.
   http://www.virtualpediatrichospital.org/

Well-Connected
   Offering over 100 in-depth reports on physical and mental diseases and wellness issues. Written by medical writers and reviewed by a board at Harvard Medical School. Some information available free but most requires paid access.
   http://www.well-connected.com

eMedicine - Consumer Treatment Guidelines
   Textbook on the treatment of common medical problems.
   http://www.emedicine.com/general/index.shtml