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The effect of an introductory letter on participation rates using telephone recruitment
Brent Robertson, Martha Sinclair, Andrew Forbes, Martyn Kirk, Christopher K. FairleyVolume:
24
Year:
2000
Language:
english
Pages:
1
DOI:
10.1111/j.1467-842x.2000.tb00512.x
File:
PDF, 16 KB
english, 2000