Cotterill, Sarah <br/><br/>
The effect of using social pressure in cover letters to improve retention in a longitudinal health study: an embedded randomised controlled retention trial.  [electronic resource] 

 -  Trials  07 2017 
 - 341 p.  digital 
<br/><br/> Publication Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>1745-6215 
<br/><br/><label>Standard No.: </label>10.1186/s13063-017-2090-5  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aged<br/>Aged, 80 and over<br/>Correspondence as Topic<br/>England<br/>Female<br/>Health Behavior<br/>Humans<br/>Longitudinal Studies<br/>Male<br/>Motivation<br/>Odds Ratio<br/>Patient Selection<br/>Persuasive Communication<br/>Research Design<br/>Research Subjects--psychology<br/>Social Behavior<br/>Surveys and Questionnaires<br/>Time Factors