Uhlig, Constantin E <br/><br/>
Efficiencies of Internet-based digital and paper-based scientific surveys and the estimated costs and time for different-sized cohorts.  [electronic resource] 

 -  PloS one  2014 
 - e108441 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1932-6203 
<br/><br/><label>Standard No.: </label>10.1371/journal.pone.0108441  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adolescent<br/>Adult<br/>Aged<br/>Cohort Studies<br/>Data Collection--economics<br/>Demography<br/>Electronic Mail<br/>Female<br/>Hospitals, University<br/>Humans<br/>Internet<br/>Male<br/>Middle Aged<br/>Paper<br/>Postal Service<br/>Surveys and Questionnaires<br/>Young Adult