Efficiencies of Internet-Based Digital and Paper-Based Scientific Surveys and the Estimated Costs and Time for Different-Sized Cohorts

Open Access

Peer-reviewed

Research Article

Constantin E. Uhlig ,

* E-mail: uhligc@uni-muenster.de

Affiliation Department of Ophthalmology, University of Muenster Medical Center, Muenster, Germany
⨯
Berthold Seitz,

Affiliation Department of Ophthalmology, Saarland University Medical Center, Homburg/Sarr, Germany
⨯
Nicole Eter,

Affiliation Department of Ophthalmology, University of Muenster Medical Center, Muenster, Germany
⨯
Julia Promesberger,

Affiliation Department of Ophthalmology, University of Muenster Medical Center, Muenster, Germany
⨯
Holger Busse

Affiliation Department of Ophthalmology, University of Muenster Medical Center, Muenster, Germany
⨯

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