Ulipristal acetate versus levonorgestrel-releasing intrauterine system for heavy menstrual bleeding: the UCON randomised controlled trial and mechanism of action study oleh Lucy HR Whitaker, Lee J Middleton, Lee Priest, Smita Odedra, Versha Cheed, Elaine P Nicholls, Alistair RW Williams, Neil Roberts, Clive E Stubbs, Konstantios Tryposkiadis, Hannah Bensoussane, Rohan Chodankar, Alison A Murray, Moira Nicol, Aleksandra O Tsolova, Kaiming Yin, Marcos Cruz, Hui Wei Leow, Lucy E Kershaw, Suzanne L McLenachan, Graham McKillop, Jane Walker, Scott I Semple, T Justin Clark, Mary Ann Lumsden, Dharani K Hapangama, Lucky Saraswat, Siladitya Bhattacharya, Paul Smith, Jane Daniels, Hilary OD Critchley