RT Journal Article SR Electronic T1 Oestrogen plus progestin was not effective for long term secondary prevention of coronary heart disease in postmenopausal women JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 12 OP 12 DO 10.1136/ebm.8.1.12 VO 8 IS 1 YR 2003 UL http://ebm.bmj.com/content/8/1/12.abstract AB