The effect of an introductory letter on participation rates...

The effect of an introductory letter on participation rates using telephone recruitment

Brent Robertson, Martha Sinclair, Andrew Forbes, Martyn Kirk, Christopher K. Fairley
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Volume:
24
Year:
2000
Language:
english
Pages:
1
DOI:
10.1111/j.1467-842x.2000.tb00512.x
File:
PDF, 16 KB
english, 2000
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