{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,8]],"date-time":"2026-02-08T00:06:59Z","timestamp":1770509219541,"version":"3.49.0"},"reference-count":9,"publisher":"Informa UK Limited","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["The European Journal of Contraception & Reproductive Health Care"],"published-print":{"date-parts":[[2010,2]]},"DOI":"10.3109\/13625180903585431","type":"journal-article","created":{"date-parts":[[2010,2,8]],"date-time":"2010-02-08T08:28:19Z","timestamp":1265617699000},"page":"1-3","source":"Crossref","is-referenced-by-count":18,"title":["After 50 years of ethinylestradiol, another oestrogen in combined oral contraceptives"],"prefix":"10.1080","volume":"15","author":[{"given":"Joaquim Calaf i","family":"Alsina","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"301","published-online":{"date-parts":[[2010,2,8]]},"reference":[{"key":"CIT0001","first-page":"14","volume-title":"Proceedings of a Symposium on 19-nor progestational steroids","author":"Rock J","year":"1957"},{"key":"CIT0002","doi-asserted-by":"crossref","first-page":"1333","DOI":"10.1016\/0002-9378(58)90722-1","volume":"75","author":"Pincus G","year":"1958","journal-title":"Am J Obstet Gynecol"},{"key":"CIT0003","doi-asserted-by":"publisher","DOI":"10.1093\/jhmas\/57.2.117"},{"key":"CIT0004","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(61)91061-3"},{"key":"CIT0005","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.1979.tb11276.x"},{"key":"CIT0006","doi-asserted-by":"publisher","DOI":"10.1016\/S0010-7824(96)00201-6"},{"key":"CIT0007","doi-asserted-by":"publisher","DOI":"10.1016\/S0940-2993(98)80034-1"},{"key":"CIT0009","doi-asserted-by":"publisher","DOI":"10.1016\/j.contraception.2008.05.004"},{"key":"CIT0010","doi-asserted-by":"publisher","DOI":"10.1080\/13625180902850039"}],"container-title":["The European Journal of Contraception & Reproductive Health Care"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/www.tandfonline.com\/doi\/pdf\/10.3109\/13625180903585431","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2017,6,19]],"date-time":"2017-06-19T04:34:19Z","timestamp":1497846859000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.tandfonline.com\/doi\/full\/10.3109\/13625180903585431"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2010,2]]},"references-count":9,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2010,2,8]]},"published-print":{"date-parts":[[2010,2]]}},"alternative-id":["10.3109\/13625180903585431"],"URL":"https:\/\/doi.org\/10.3109\/13625180903585431","relation":{},"ISSN":["1362-5187","1473-0782"],"issn-type":[{"value":"1362-5187","type":"print"},{"value":"1473-0782","type":"electronic"}],"subject":[],"published":{"date-parts":[[2010,2]]}}}