PT - JOURNAL ARTICLE AU - Julian L. Ambrus TI - Oral contraceptives, ABO blood types and thromboembolism AID - 10.1503/cmaj.113-2148 DP - 2013 Nov 19 TA - Canadian Medical Association Journal PG - 1526--1526 VI - 185 IP - 17 4099 - http://www.cmaj.ca/content/185/17/1526.1.short 4100 - http://www.cmaj.ca/content/185/17/1526.1.full SO - CMAJ2013 Nov 19; 185