chronic, repetitive use and uterine/breast cancer risk long-term?
The Breast Cancer Prevention Institute has this brochure:
Link to PDF: http://www.bcpinstitute.org/FactSheets/Increase-decrease-table-english.pdf
These are Medical Doctors that run this Breast Cancer Prevention Program.
If you want to donate to a cause to prevent Breast Cancer, these are the folks to give to in lieu of Koman (spelling?)