We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleEffect of hormone replacement therapy on breast cancer risk: estrogen versus estrogen plus progestin.AuthorsRoss RK; Paganini-Hill A; Wan PC; Pike MCPublicationJournal of the National Cancer Institute, 2000, Vol 92, Issue 4, p328ISSN0027-8874Publication typearticleDOI10.1093/jnci/92.4.328