Venous Insufficiency

• Department of Physical Medicine and Rehabilitation, Health Sciences University Sultan Abdulhamid Han Training and Research Hospital — Istanbul, Uskudar, Turkey (Türkiye)

• Aydin Adnan Menderes University Hospital — Aydin, Efeler, Turkey (Türkiye)

• Site 17 — Guntersville, Alabama, United States
• Site 2b — Castro Valley, California, United States
• Site 19b — Glendale, California, United States
• Site 36 — Oxnard, California, United States

• İzmir Democracy Univercity — Izmir, Konak, Turkey (Türkiye)

• University of Texas Southwestern Medical Center — Dallas, Texas, United States

• Bahçeşehir University Department of Physiotherapy and Rehabilitation — Istanbul, Turkey (Türkiye)

Not specified

Not specified

• Heart Artery and Vein Center of Fresno — Fresno, California, United States

• Hospital Israelita Albert Einstein — São Paulo, Brazil