. 2011 Jul 9;13(5):422–429. doi: 10.1007/s11920-011-0219-x
© The Author(s) 2011
This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
Fig. 1.
Literature search flowchart