von Hertzen, H; Grimes, D; Ali, MM; (2001) Lowering the doses of mifepristone and gemeprost for early abortion: a randomised controlled trial. British journal of obstetrics and gynaecology, 108. pp. 738-748. ISSN 0306-5456 https://researchonline.lshtm.ac.uk/id/eprint/18277 Full text not available from this repository.