The Whiteley Clinic  
   Information about economy class syndrome and deep vein thrombosis (DVT) including precautions for air travel.
   http://www.economy-class.co.uk

The Sol Sherry Thrombosis Research Center  
   Features center information, staff biographies, list of seminars offered, and links to resources.
   http://www.temple.edu/sstrc/

Venous Thrombosis  
   The NIH has evaluated the evidence from clinical trials it related to people at high risk for the development of venous thromboembolic events.
   http://cardiology.medscape.com/govmt/NIH/1999/guidelines/NIH-prevention/NIH-prev-toc.html

Thrombosis Interest Group of Canada  
   Detailed information on blood clots. Explanations and treatment options.
   http://www.tigc.org

Deep Vein Thrombosis Hub  
   A brief definition, followed by links to research articles, overviews, diagnosis and treatment.
   http://www.projectlinks.org/thrombosis

Airhealth.org  
   Provides information about Economy Class Syndrome and offers DVT prevention tips for pilots and passengers, treatment information, research, and a review of how well various airlines inform their passengers of the risks of blood clots from air travel.
   http://www.airhealth.org/

Economy Class Syndrome  
   Features description of risks and symptoms, prevention tips, information about compression hosiery, and links to related articles.
   http://www.economyclasssyndrome.net/

UCSF Hemostasis and Thrombosis Center  
   Features information about current research studies such as ELATE and PREVENT, anticogulation and antithrombotic medications, treatment and testing, hypercoagulability factors, and detailed information for patients.
   http://medicine.ucsf.edu/htc/

Coalition Formed to Raise Awareness of DVT  
   Article describing the goals of the Council for Leadership on Thrombosis Awareness and Management. [Requires free registration]
   http://www.medscape.com/viewarticle/426817

Medical Experts Unite to Raise Awareness of Risk, Threat of Blood Clots  
   Council for Leadership on Thrombosis Awareness and Management formed to advance prevention and treatment of thrombosis. Includes disease description and council's education plans.
   http://www.eurekalert.org/pub_releases/2002-02/m-meu021302.php

Thrombosis Research Institute  
   A multidisciplinary organization concerned with the interrelated problems of thrombosis and atherosclerosis. Provides articles for professionals and consumers.
   http://www.tri-london.ac.uk/

Lower Extremity Venous Anatomy and the Use of Ultrasound for Detecting and Diagnosing Thrombus  
   Article describing how ultrasound is used to diagnose DVTs in the lower extremities.
   http://test.cvtcollege.org/Ac_Programs/dms_vascular/studentErika.html

Thrombosis Crisis in Hospital Medicine  
   Free continuing medical education symposia from American Health Consultants on acute thrombosis management in emergency medicine.
   http://www.ahcpub.com/ahc_root_html/products/conferences/thrombosishm_aventis2003.html

Severe Pulmonary Embolism Associated with Air Travel  
   Article from the New England Journal of Medicine. [Free registration required to read full article]
   http://content.nejm.org/cgi/content/abstract/345/11/779

The Thrombophilias: Well-Defined Risk Factors with Uncertain Therapeutic Implication  
   Annals of Internal Medicine article.
   http://www.annals.org/issues/v135n5/full/200109040-00013.html

Pulmonary Embolism  
   Article by Craig Feied, MD, detailing the background, diagnosis, and treatment of pulmonary embolism.
   http://www.emedicine.com/EMERG/topic490.htm

Spotlight Health: Deep Vein Thrombosis Overview  
   Discusses causes, treatment, risk factors, diagnosis, and research.
   http://www.spotlighthealth.com/dvt/dvt_overview/dvtoverview.html

Tim Hentzel's Deep Vein Thrombosis  
   Essay and weblog describing one man's experience with DVT.
   http://www.hentzel.com/clot.htm

Four Corners Online: Economy Class Syndrome  
   Archive of a 2001 discussion prompted by a young British woman's death following a vacation in Australia.
   http://www2b.abc.net.au/4corners/sforum60/

CBC News: The Perils of Travellers' Thrombosis  
   Background on the cause, symptoms, and treatment of Economy Class Syndrome with links to related news stories.
   http://www.cbc.ca/news/indepth/background/thrombosis.html

Travellers Thrombosis  
   From Dr. P. C. Malone, offering research papers, articles, and DVT information.
   http://www.travellersthrombosis.co.uk/

Yahoo! Groups: Thrombosis  
   Discussion mailing list for sufferers of deep vein thromboses, pulmonary emboli, and other vascular disorders.
   http://health.groups.yahoo.com/group/thrombosis/

New England Journal of Medicine: Thromboembolism  
   Collection of articles covering topics such as embolic complications and thrombolytic therapies. Includes research articles, case reports, reviews, and editorial commentary. [Paid registration required to view some recent content]
   http://content.nejm.org/cgi/collection/anticoagulantsthromboembolism

Investigators Against ThromboEmbolism (INATE)  
   Information about the prevention and treatment of venous thromboembolism. Includes information for patients and a restricted area for registered health care providers only.
   http://www.inate.org/

The Australasian Society of Thrombosis and Haemostasis  
   Represents clinicians and scientists committed to promoting and fostering knowledge relating to haemostasis. Includes mission, meeting minutes, newsletters, membership information, members-only discussion board, and related links.
   http://www.asth.org.au/

British Society for Haemostasis and Thrombosis  
   Dedicated to the advancement of public education and the promotion of those branches of medical science concerned with haemostasis and thrombosis. Features history, membership information, bursaries, news, and meeting schedule.
   http://med6.bham.ac.uk/bsht/

Diagnosis of Pulmonary Embolism  
   Canadian Medical Association journal article describing how these blood clots are diagnosed.
   http://www.cmaj.ca/cgi/content/full/168/2/183

DVT.net  
   From Aventis Pharmaceuticals. Information on the causes, symptoms, and treatments of deep vein thrombosis, pulmonary embolism, and stroke. Includes free membership area with health tips and tools.
   http://www.dvt.net/

eMedicine Health: Blood Clot in the Legs  
   Provides information on causes, symptoms, and treatment of deep venous thrombosis.
   http://www.emedicinehealth.com/articles/10885-1.asp

eMedicine Health: Phlebitis  
   Provides information on the causes, symptoms, and treatment of phlebitis.
   http://www.emedicinehealth.com/articles/11161-1.asp

eMedicine Health: Pulmonary Embolism  
   Provides information on the causes, symptoms, and treatment of pulmonary embolism.
   http://www.emedicinehealth.com/articles/17711-1.asp

DVT.org  
   Features their Best Practices: Preventing Deep Vein Thrombosis and Pulmonary Embolism manual in HTML and PDF formats plus information about the treatment of thrombosis.
   http://www.outcomes-umassmed.org/dvt/