Tamoxifen prophylaxis.
D000328:Adult; D000367:Age Factors; D000368:Aged; D001943:Breast Neoplasms / Q000517:prevention & control*; D002986:Clinical Trials as Topic; D005260:Female; D006801:Humans; D008297:Male; D008593:Menopause; D008875:Middle Aged; D011247:Pregnancy; D011252:Pregnancy Complications, Neoplastic / Q000188:drug therapy; D011897:Random Allocation; D011960:Receptors, Estrogen / Q000032:analysis; D013629:Tamoxifen / Q000627:therapeutic use*
D011960:Receptors, Estrogen; D013629:Tamoxifen