Randomized trial of questionnaire length.
Rothman
Kenneth J
KJ
Mikkelsen
Ellen M
EM
Riis
Anders
A
Sørensen
Henrik T
HT
Wise
Lauren A
LA
Hatch
Elizabeth E
EE
D015982:Bias; D015331:Cohort Studies; D003718:Denmark; D005260:Female; D005298:Fertility; D006801:Humans; D020407:Internet; D018579:Patient Selection; D011795:Surveys and Questionnaires