Increasing response rates to postal questionnaires. Effect of incentives on response rates must be considered.
Paula-J
PJ
Roberts
Chris
C
Roberts
Bonnie
B
Sibbald
David J
DJ
Torgerson
D000328:Adult; D000368:Aged; D015982:Bias; D015914:Estrogen Replacement Therapy; D005260:Female; D006801:Humans; D008875:Middle Aged; D009042:Motivation; D016032:Randomized Controlled Trials as Topic; D011795:Surveys and Questionnaires