The effect of an introductory letter on participation rates using telephone recruitment.
Robertson
B
B
Sinclair
M
M
Forbes
A
A
Kirk
M
M
Fairley
C K
CK
D001315:Australia; D016022:Case-Control Studies; D003256:Community Participation; D003457:Cryptosporidiosis / Q000453:epidemiology; D006801:Humans; D018579:Patient Selection; D010865:Pilot Projects; D012307:Risk Factors; D013689:Telephone / Q000706:statistics & numerical data*; D014739:Victoria / Q000453:epidemiology