Discrepancy between ultrasonography and hysteroscopy and histology of endometrium in postmenopausal breast cancer patients using Tamoxifen. - Mourits,M.J.; Van der Zee,A.G.; Willemse,P.H.; Ten Hoor,K.A.; Hollema,H.; De Vries,E.G. (Gynecol Oncol, 1999)