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A photograph of the researcher on the invitation letter did not affect the participation rate of a postal survey: a randomized study within a trial (SWAT).
Prediger, Barbara; Könsgen, Nadja; Bora, Ana-Mihaela; Schlimbach, Anna; Pieper, Dawid.
Affiliation
  • Prediger B; Institute for Research in Operative Medicine, Witten/Herdecke University, Cologne, Germany. Barbara.prediger@uni-wh.de.
  • Könsgen N; Institute for Research in Operative Medicine, Witten/Herdecke University, Cologne, Germany.
  • Bora AM; Institute for Research in Operative Medicine, Witten/Herdecke University, Cologne, Germany.
  • Schlimbach A; Institute for Research in Operative Medicine, Witten/Herdecke University, Cologne, Germany.
  • Pieper D; Institute for Research in Operative Medicine, Witten/Herdecke University, Cologne, Germany.
BMC Med Res Methodol ; 22(1): 249, 2022 09 24.
Article in En | MEDLINE | ID: mdl-36153482
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Research Design / Research Personnel Type of study: Clinical_trials / Etiology_studies / Prognostic_studies Limits: Humans Country/Region as subject: Europa Language: En Journal: BMC Med Res Methodol Journal subject: MEDICINA Year: 2022 Document type: Article Affiliation country: Country of publication:
Fulltext
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Research Design / Research Personnel Type of study: Clinical_trials / Etiology_studies / Prognostic_studies Limits: Humans Country/Region as subject: Europa Language: En Journal: BMC Med Res Methodol Journal subject: MEDICINA Year: 2022 Document type: Article Affiliation country: Country of publication: