RT Journal Article SR Electronic T1 Ultrastructure study of postmenopausal endometria of tibolone, conjugated estrogen + medroxyprogesterone acetate and tamoxifen users JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 1917 OP 1919 VO 28 IS 12 A1 Nas, Tuncay A1 Sargon, Mustafa F. A1 Celik, Hamdi H. A1 Keskin, Pinar O. A1 Gursoy, Rifat H. A1 Biberoglu, Kutay YR 2007 UL http://smj.org.sa/content/28/12/1917.abstract AB