Histological and immunohistological evaluation of postmenopausal endometrium after 3 weeks of treatment with tibolone, estrogen only, or estrogen plus progestagen - Klaassens, AH A; van Wijk, F H; Hanifi-Moghaddam, P; Sijmons, B; Ewing, P C; Ten, M J; Kooi, S; Kloosterboer, H J; Blok, L J; Burger, G W (Fert Steril, 2006)