It’s been years since I read it (I remember I had to pay for access). I’ve been looking for it, as I’ve cited the specific paper before. If anyone can find this, please let me know. I will continue to look for it.
In the meantime, we can all read the New York Times article about hormonal birth control methods and their link to cancer: https://www.nytimes.com/2017/12/06/health/birth-control-breast-cancer-hormones.html