Kronos Early Estrogen Prevention Study (KEEPS)
Summary
The registered summary isn't in our current data snapshot. Read it on the ClinicalTrials.gov record ↗. Why? →
Investigators
The overall officials registered on this study. Names that resolve to a findmyKOL profile link to it; the rest are shown as registered.
- Dennis M Black, PhD
University of California, San Francisco
Principal Investigator - Frederick Naftolin, MD, PhD
Kronos Longevity Research Institute
Study Director - Howard Hodis, MD
University of Southern California
Principal Investigator - Michael Mendelsohn, MD
Tufts Medical Center
Principal Investigator - S Mitchell Harman, MD, PhD
Kronos Longevity Research Institute
Study Director - Sanjay Asthana, MD
University of Wisconsin, Madison
Principal Investigator
A profile link is shown only when the registered name resolves to a person record with a confident, namesake-checked match; ambiguous names stay unlinked.
Sites
9 registered facilities, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.
- Kronos Longevity Research Institute
Phoenix, Arizona, United States
- University of California, San Francisco
San Francisco, California, United States
- Yale University Medical Center
New Haven, Connecticut, United States
- Brigham and Women'S Hospital
Boston, Massachusetts, United States
- Mayo Clinic
Rochester, Minnesota, United States
- Columbia Presbyterian Hospital
New York, New York, United States
- Albert Einstein College of Medicine
The Bronx, New York, United States
- University of Utah
Salt Lake City, Utah, United States
- University of Washington/va Puget Sound, Hcs
Seattle/Tacoma, Washington, United States
Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.
Drugs studied
No drug or biological interventions are in our data for this study — it may test a procedure, device or behavioral intervention, or the intervention list isn't in our current snapshot. See the registry record ↗. Why? →
Registration & key dates
Registry attributes as recorded on the ClinicalTrials.gov study record.
- Start
- 30 Sept 2005
- Primary completion
- 31 May 2012
- Completion
- 31 Jul 2012
- Last update posted
- 14 Sept 2009
- Registered enrollment
- 728
- Registry id
- NCT00154180
Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 12 Jul 2026. Registry facts are shown as registered by the study sponsor; findmyKOL does not interpret them.