In a randomized study of envelope and ink color, colored ink was found to increase the response rate to a postal questionnaire

✍ Scribed by Kate S.M. Taylor; Carl E. Counsell; Clare E. Harris; Joanna C. Gordon; Sofia C.C. Fonseca; Amanda J. Lee

• Book ID: 116622957
• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 133 KB
• Volume: 59
• Category: Article
• ISSN: 0895-4356
• DOI: 10.1016/j.jclinepi.2006.03.011