1. On being the right size: a reappraisal of mammography trials in Canada and Sweden 
Steven A Narod 
The Lancet 
Volume 349, Issue 9068, (June 1997)
DOI: /S (05)
Copyright © 1997 Elsevier Ltd Terms and Conditions

2. Figure
Frequency distributions of sizes of breast cancers detected in Sweden and in Canada, in women invited for mammography and in controls
Swedish cases aged 40–74 years, 729 controls, 1295 mammography; Canadian cases aged 40–59 years, 690 controls, 880 mammography.
The Lancet  , DOI: ( /S (05) )
Copyright © 1997 Elsevier Ltd Terms and Conditions