Endometrial Cancer Stage I

• Hartford Healthcare Cancer Institute @ Hartford Hospital — Hartford, Connecticut, United States
• Miami Cancer Institute Baptist Health South Florida — Miami, Florida, United States
• ADVENTHEALTH (Data collection only) — Orlando, Florida, United States
• Mayo Clinic (Data Collection and Data Analysis) — Rochester, Minnesota, United States

• Houston Methodist Hospital — Houston, Texas, United States
• Hospital Britanico — Buenos Aires, Ciudad Autónoma de Buenos Aires (caba), Argentina
• Chris O'Brien Lifehouse — Camperdown, New South Wales, Australia
• Liverpool Hospital — Liverpool, New South Wales, Australia

• Brigham and Women's Hospital — Boston, Massachusetts, United States
• Dana-Farber Cancer Institute — Boston, Massachusetts, United States

• Ankara University — Ankara, Turkey (Türkiye)
• Dokuz Eylul University — Izmir, Turkey (Türkiye)

• Tongji Hospital, Huazhong University of Science and Technology — Wuhan, Hubei, China
• Qilu Hospital of Shandong University — Jinan, Shandong, China
• Women's Hospital School of Medicine Zhejiang University — Hangzhou, Zhejiang, China
• Peking University Peoples Hospital — Beijing, China

• Westmead Hospital — Sydney, New South Wales, Australia
• Royal Brisbane and Women's Hospital — Brisbane, Queensland, Australia
• Peter MacCallum Cancer Centre — Melbourne, Victoria, Australia

• Women's Hospital School of Medicine Zhejiang University — Hangzhou, Zhejiang, China

Not specified

• 1. Department of Gynecologic Oncology, Moscow City Oncology Hospital No. 62 — Istra, Moscow Oblast, Russia

• Service de Chirurgie Gynécologique Obstétrique Reproduction Humaine — Clermont-Ferrand, France
• CHIC - Gynécologie-Obstétrique-Maternité — Créteil, France
• Service de chirurgie gynécologique, Centre de lutte contre le cancer — Dijon, France
• Service de chirurgie gynécologique, Centre Hospitalier Simone Veil — Eaubonne, France