Reply to 'Comment on 'Effect of population breast screening on breast cancer mortality up to 2005 in England and Wales: an individual-level cohort study''
1 Faculty of Medicine, School of Public Health and Community Medicine, University of New South Wales, Sydney 2052, NSW, Australia.
2 School of Health Sciences, Centre for Population Research, Sansom Institute for Health Research, University of South Australia, Adelaide, SA 5000, Australia.