Physicians' Health Study II: Vitamin E, Ascorbic Acid, Beta Carotene, and/or Multivitamins in Preventing Cancer and Cardiovascular Disease in Older Healthy Male Doctors
This study is ongoing, but not recruiting participants.
Study NCT00270647.
Last updated on July 23, 2008.
Information provided by National Cancer Institute (NCI)
Please refer to this study by its ClinicalTrials.gov identifier: NCT00270647