Figure 1

(A) Cohort selection diagram and (B) accumulation of the cohort through the study period, women diagnosed between 1 April 1989–31 March 2011, followed up to 31 July 2012.
(A) Cohort selection diagram and (B) accumulation of the cohort through the study period, women diagnosed between 1 April 1989–31 March 2011, followed up to 31 July 2012.