Mammary gland tissue was collected from one mature female BALB/c mouse at euthanasia, in accordance with the NIH Guide for the Care and Use of Laboratory Animals.
Mammary gland, liver and kidney tissue was collected from one 5-month-old nulliparous female Yucatan miniature pig at euthanasia. Mammary gland tissue was collected from one multiparous, post-lactational Landrace sow at euthanasia. All procedures were conducted in accordance with the University of Vermont Institutional Animal Care and Use Committee, protocol numbers 02-147 and 02-138AP.