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Non-response bias in physical activity trend estimates
Cora L Craig, Christine Cameron, Joe Griffiths, Adrian Bauman, Catrine Tudor-Locke, Ross E AndersenVolume:
9
Language:
english
DOI:
10.1186/1471-2458-9-425
Date:
December, 2009
File:
PDF, 353 KB
english, 2009