RT Journal Article SR Electronic T1 Investigating the association between ethnicity and survival from breast cancer using routinely collected health data: challenges and potential solutions JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 88 OP 88 DO 10.1136/jech.2009.096735j VO 63 IS Suppl 2 A1 A. Downing A1 D. Forman A1 J. D. Thomas A1 R. M. West A1 G. Lawrence A1 M. S. Gilthorpe YR 2009 UL http://jech.bmj.com/content/63/Suppl_2/88.abstract AB