• American Cancer Society
• American Heart Association
• American Venous Forum
• APS Foundation of America (Antiphospholipid Antibody Syndrome)
• Blood: The Vital Connection  – American Society of Hematology (ASH) patient resource
• ClotCare Online Resource
• Guide to the safe use of blood thinners
• Lupus Foundation of America
• National Alliance for Thrombosis and Thrombophilia (NATT)
  
• Sickle Cell Disease Association of America
• Society for Vascular Surgery
• Thrombophilia Awareness Project
• U.S. MedlinePlus  – Information on health conditions, drug information and more, from the U.S. National Library of Medicine and the National Institutes of Health
• Vascular Disease Foundation

Compression stockings

• HealthyLegs
• Juzo Compression Stockings