![](/img/cover-not-exists.png)
Strategies for Recruitment and Retention of Participants in Clinical Trials
Probstfield, Jeffrey L., Frye, Robert L.Volume:
306
Language:
english
Journal:
JAMA
DOI:
10.1001/jama.2011.1544
Date:
October, 2011
File:
PDF, 51 KB
english, 2011