RT Journal Article SR Electronic T1 Associations between the timing and dosing of aspirin prophylaxis and term and preterm pre-eclampsia JF BMJ Evidence-Based Medicine JO BMJ EBM FD BMJ Publishing Group Ltd SP 159 OP 160 DO 10.1136/bmjebm-2018-110931 VO 23 IS 4 A1 Lisa Askie A1 Lelia Duley YR 2018 UL http://ebm.bmj.com/content/23/4/159.abstract AB