Do postage-stamps increase response rates to postal surveys? A randomized controlled trial.
Harrison
R A
RA
Directorate of Public Health, Wigan and Bolton Health Authority, Wigan, UK. roger_harrison@yahoo.com
Holt
D
D
Elton
P J
PJ
D000328:Adult; D000368:Aged; D016009:Chi-Square Distribution; D004739:England; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D011177:Postal Service