DOI:
10.1055/s-00000056
Physikalische Medizin, Rehabilitationsmedizin, Kurortmedizin
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References
Iglesias C, Torgerson D.
Does length of questionnaire matter? A randomised trial of response rates to a mailed questionnaire.
J Health Serv Res Policy 2000;
5: 219-221 doi:10.1177/135581960000500406
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