Français | Español What is a Cancer Prevention Clinical Trial? Contact Us Frequently asked questions Find a Participating Centre Glossary of terms About the NCIC CTG English - Home - Excel Study, Breast Cancer Prevention Trial Français - Accueil - L'étude ExCel, Essai clinique sur la prévention du cancer du sein Español - Pagina principal - estudio de investigación ExCel, Ensayo clínico para la prevención del cáncer de mama Information for investigators and local site coordinators Information Video Tell a friend What can I expect if I join ExCel? Why is ExCel a placebo-controlled clinical trial? Learn more about the ExCel research study What is the ExCel research study? Where can I find more information about breast cancer? Who qualifies?