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Introduction. The western plains and the Rocky Mountain region of Canada undoubtedly constitute one of the most important fields of investigation in connection with the glacial period in North… (More)
To determine the relationship of oral contraceptive use and breast cancer, 96 rhesus monkeys were administered either Enovid-E (2.5 mg norethynodrel and .1 mg mestranol) or Ovulen (1 mg ethynodiol… (More)
The administration of two oral contraceptives to female dogs for 5 years did not produce ocular lesions. Corneal and lenticular opacities occurred with equal frequency in control and treated groups,… (More)
The present research was designed to assess the potential for progressive growth of hyperplastic, adenomatous, and carcinomatous mouse liver lesions grafted into syngeneic hosts and to determine the… (More)
Analyses for selected components in random samples of natural product diets for experimental rodents revealed significant variations in content of nutrients and contaminants in various lots of feed.… (More)