Thicker paper and larger font increased response and completeness in a postal survey
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PII: S0895-4356(08)00191-1
doi:10.1016/j.jclinepi.2008.07.005
© 2008 Elsevier Inc. All rights reserved.
PII: S0895-4356(08)00191-1
doi:10.1016/j.jclinepi.2008.07.005
© 2008 Elsevier Inc. All rights reserved.