Linda S. Cook, Claire R. Pestak, Andy Cy Leung, Helen Steed, Jill Nation, Kenneth Swenerton: Combined oral contraceptive use before the first birth and epithelial ovarian cancer risk. British Journal of Cancer, 17.1.2017, nro 2, s. 265–269. PubMed:27959890doi:10.1038/bjc.2016.400ISSN 1532-1827Artikkelin verkkoversio.
Linda S. Cook, Claire R. Pestak, Andy Cy Leung, Helen Steed, Jill Nation, Kenneth Swenerton: Combined oral contraceptive use before the first birth and epithelial ovarian cancer risk. British Journal of Cancer, 17.1.2017, nro 2, s. 265–269. PubMed:27959890doi:10.1038/bjc.2016.400ISSN 1532-1827Artikkelin verkkoversio.
Linda S. Cook, Claire R. Pestak, Andy Cy Leung, Helen Steed, Jill Nation, Kenneth Swenerton: Combined oral contraceptive use before the first birth and epithelial ovarian cancer risk. British Journal of Cancer, 17.1.2017, nro 2, s. 265–269. PubMed:27959890doi:10.1038/bjc.2016.400ISSN 1532-1827Artikkelin verkkoversio.
Linda S. Cook, Claire R. Pestak, Andy Cy Leung, Helen Steed, Jill Nation, Kenneth Swenerton: Combined oral contraceptive use before the first birth and epithelial ovarian cancer risk. British Journal of Cancer, 17.1.2017, nro 2, s. 265–269. PubMed:27959890doi:10.1038/bjc.2016.400ISSN 1532-1827Artikkelin verkkoversio.