Comparing an Operation to Monitoring, With or Without Endocrine Therapy (COMET) Trial For Low Risk DCIS

New York-Presbyterian Weill Cornell Medical Center, New York

Montefiore-Einstein Center for Cancer Care at Montefiore Medical Park, The Bronx

State University of New York Upstate Medical University, Syracuse

Roswell Park Cancer Institute, Buffalo

Magee-Womens Hospital of UPMC, Pittsburgh

WellSpan Health York Cancer Center, York

Guthrie Medical Group PC-Robert Packer Hospital, Sayre

MedStar Washington Hospital Center, Washington D.C.

University of Maryland - Greenebaum Comprehensive Cancer Center, Baltimore

Anne Arundel Medical Center, Annapolis

Virginia Commonwealth University Massey Cancer Center, Richmond

Sentara Norfolk General Hospital, Norfolk

West Virginia University Medicine, Morgantown

Wake Forest Baptist Medical Center, Winston-Salem

Cone Health Cancer Center, Greensboro

Novant Health Breast Surgery - Greensboro, Greensboro

Southeastern Medical Oncology Center, Goldsboro

UNC Lineberger Comprehensive Cancer Center, Chapel Hill

Rex Cancer Center, Raleigh

Duke University Medical Center, Durham

East Carolina University, Greenville

Levine Cancer Institute, Charlotte

Novant Health Presbyterian Medical Center, Charlotte

Cape Fear Valley Health System, Fayetteville

Carolina East Medical Center, New Bern

Medical University of South Carolina, Charleston

Georgetown Hospital System, Georgetown

Greenville Memorial Hospital, Greenville

Mayo Clinic Florida, Jacksonville

Memorial Healthcare System, Hollywood

Baptist Cancer Care, Memphis

University of Kentucky/Markey Cancer Center, Lexington

St. Elizabeth Healthcare Edgewood, Edgewood

Grady Hospital, Delaware

OhioHealth Grady - Delaware Health Center, Delaware

Licking Memorial Hospital, Newark

St. Ann's Hospital, Westerville

Ohio State University Comprehensive Cancer Center, Columbus

Ohio State University Comprehensive Cancer Center, Columbus

Mount Carmel East Hospital, Columbus

Columbus Oncology & Hematology INC, Columbus

Riverside Methodist Hospital, Columbus

Grant Medical Center, Columbus

MidOhio Oncology Hematology, Mark H. Zangmeister Center, Columbus

Mount Carmel West Hospital, Columbus

Doctors Hospital, Columbus

OhioHealth Marion General Hospital, Marion

Genesis Health Care System, Zanesville

St. Elizabeth Youngstown Hospital, Youngstown

OhioHealth Mansfield Hospital, Mansfield

Dayton Physicians-Atrium, Franklin

Wayne Hospital, Greenville

Dayton Physicians-Miami Valley Hospital North, Dayton

Kettering Medical Center, Kettering

Dayton Physicians-Miami Valley Hospital South, Centerville

Strecker Cancer Center - Belpre, Belpre

Marietta Memorial Hospital, Marietta

Armes Family Cancer Center, Findlay

Beaumont NCORP, Royal Oak

Saint Joseph Mercy Hospital, Ann Arbor

Henry Ford Hospital, Detroit

Aurora Health Care, Aurora Cancer Care, Kenosha

Cancer Research Consortium of West Michigan, Grand Rapids

Medical Oncology and Hematology Associates - Des Moines, Des Moines

University of Iowa/Holden Comprehensive Cancer Center, Iowa City

Aurora Health Care, Germantown Health Center, Germantown

Aurora Health Care, Aurora Cancer Care, Grafton

Aurora Health Care, Aurora Cancer Care, Summit

Aurora Health Care, Aurora Cancer Care, Sheboygan

Aurora Health Care, Aurora Cancer Care, Burlington

Aurora Health Care, Aurora Cancer Care, Milwaukee

Vince Lombardi Cancer Clinic of Aurora St. Luke's Medical Center, Milwaukee

Froedtert and the Medical College of Wisconsin, Milwaukee

Aurora Health Care, Aurora Cancer Care, Wauwatosa

Aurora Health Care, Aurora Cancer Care, West Allis

Aurora Health Care, Aurora Cancer Care, Milwaukee

Aurora Health Care, Aurora Cancer Care, Racine

University of Wisconsin Carbone Cancer Center, Madison

Aurora Bay Area Medical Group - Cancer Care Clinic, Marinette

Aurora Health Care, Aurora Cancer Care, Marinette

Aurora Health Care, Aurora Cancer Care, Two Rivers

Saint Vincent Hospital, Green Bay

BayCare Aurora LLC, Aurora Cancer Care, Green Bay

Aurora Health Care, Aurora Cancer Care, Oshkosh

ThedaCare Regional Cancer Center -Appleton, Appleton

Aurora Health Center - Fond du Lac, Fond du Lac

Metro MN Community Oncology Research Consortium (MMCORC), Saint Louis Park

Masonic Cancer Center, University of Minnesota, Minneapolis

Mayo Clinic, Rochester

Billings Clinic, Billings

Benefis Sletten Cancer Institute, Great Falls

Community Hospital of Anaconda, Anaconda

Bozeman Health, Bozeman

Community Medical Center, Missoula

Kalispell Regional Medical Center, Kalispell

NorthShore University HealthSystem-Evanston Hospital, Evanston

Ingalls Memorial Hospital, Harvey

MD Anderson Cancer Center, Houston

Mount Sinai Hospital, New York

John H Stroger Jr Hospital of Cook County, Chicago

University of Chicago Medical Center, Chicago

Advocate Illinois Masonic Medical Center, Chicago

OSF Saint Anthony Medical Center, Rockford

Illinois Cancer Care, Peoria

Carle Cancer Center, Urbana

Washington University - Siteman Cancer Center, St Louis

University of Kansas Cancer Center, Kansas City

University of Nebraska Medical Center, Omaha

Ochsner Medical Center Jefferson, New Orleans

Mary Bird Perkins Cancer Center, Baton Rouge

Cancer Centers of Southwest Oklahoma, Lawton

UT Southwestern/Simmons Cancer Center-Dallas, Dallas

Baylor University Medical Center, Dallas

Doctors Hospital of Laredo, Laredo

Saint Joseph Hospital- Cancer Centers of Colorado, Lafayette

Colorado Cancer Research Program, Denver

Kootenai Health, Post Falls

Huntsman Cancer Institute, Salt Lake City

Mayo Clinic, Phoenix

New Mexico Cancer Care Alliance, Albuquerque

Cedars-Sinai Medical Center, Los Angeles

City of Hope, Duarte

Sharp Memorial Hospital, San Diego

Kaiser Permanente Medical Center, Vallejo

University of Hawaii Cancer Center, Honolulu

Saint Charles Health System, Bend

Overlake Hospital Medical Center, Bellevue

Providence Alaska Medical Center, Anchorage

Smilow Cancer Hospital at Yale-New Haven, New Haven

Eastern Maine Medical Center Cancer Care, Brewer

Maine Center for Cancer Medicine-Scarborough, Scarborough

New England Cancer Specialists, Scarborough

Dana-Farber Cancer Institute, Boston

New Hampshire Oncology Hematology PA, Hooksett

Englewood Hospital and Medical Center, Englewood

Hackensack University Medical Center, Hackensack

Atlantic Health System / Morristown Medical Center, Morristown

Jersey Shore University Medical Center, Neptune City

The Valley Hospital - Luckow Pavilion, Paramus

Rhode Island Hospital, Providence

The University of Vermont Medical Center, Burlington