title: Studies on the possible viral etiology of human breast cancer.
mesh_terms: D001706:Biopsy; D001943:Breast Neoplasms / Q000382:microbiology* / Q000473:pathology; D005260:Female; D017988:Gammaretrovirus; D006801:Humans; D007774:Lactation / Q000502:physiology; D008854:Microscopy, Electron; D008895:Milk, Human / Q000032:analysis; D009858:Oncogenic Viruses; D011247:Pregnancy