Carcinoma, Endometrioid

• University of Alabama at Birmingham Cancer Center — Birmingham, Alabama, United States
• University Cancer and Blood Center LLC — Athens, Georgia, United States
• Augusta University Medical Center — Augusta, Georgia, United States
• Saint Alphonsus Cancer Care Center-Boise — Boise, Idaho, United States

• 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

• UC San Diego Moores Cancer Center — La Jolla, California, United States
• University of California, San Francisco (UCSF) — San Francisco, California, United States
• Mount Sinai Comprehensive Cancer Center — Miami Beach, Florida, United States
• Florida Cancer Specialists, North — St. Petersburg, Florida, United States

• University College London Hospitals — London, United Kingdom

• Peking University People's Hosoital — Beijing, Beijing Municipality, China

• Peking University People's Hospital — Beijing, Beijing Municipality, China

Not specified

• City of Hope Comprehensive Cancer Center — Duarte, California, United States
• Los Angeles General Medical Center — Los Angeles, California, United States
• USC / Norris Comprehensive Cancer Center — Los Angeles, California, United States
• City of Hope South Pasadena — South Pasadena, California, United States

• Arizona Oncology - Tucson — Tucson, Arizona, United States
• UCLA Jonsson Comprehensive Cancer Center Clinical Research Unit — Los Angeles, California, United States
• Sutter Health- Palo Alto Medical Foundation — San Francisco, California, United States
• Rocky Mountain Cancer Center — Aurora, Colorado, United States

• London Regional Cancer Program — London, Ontario, Canada