RT Journal Article SR Electronic T1 Dose and duration of hormone use: understanding the effects of combined menopausal hormones on breast cancer better, 1976–2004 JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 1078 OP 1079 DO 10.1136/jech.2005.035147 VO 59 IS 12 A1 McPherson, Klim A1 Mant, Rebecca YR 2005 UL http://jech.bmj.com/content/59/12/1078.abstract AB