. 2014 May 12;20(4):352–361. doi: 10.1111/jep.12136
© 2014 The Authors. Journal of Evaluation in Clinical Practice published by John Wiley & Sons, Ltd.
This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Figure 1.
Research design of the study.