Combined oral contraceptives and sexual function in women—a double-blind, randomized, placebo-controlled trial - Zethraeus, Niklas; Dreber, Anna; Ranehill, Eva; Blomberg, liselott; Labrie, Fernand; von Schoultz, Bo; Johannesson, Magnus; Hirschberg, Angelica Lindén (The Journal of clinical endocrinology and metabolism, 2016)