Skip to main content
. Author manuscript; available in PMC: 2015 Sep 1.
Published in final edited form as: J Am Coll Surg. 2014 May 22;219(3):552–69.e2. doi: 10.1016/j.jamcollsurg.2014.05.007

Figure 1.

Figure 1

Study selection process from initial PubMed search results of January 2009 to July 2013.