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. Author manuscript; available in PMC: 2014 Nov 1.
Published in final edited form as: Cancer Treat Rev. 2013 Mar 1;39(7):10.1016/j.ctrv.2013.01.008. doi: 10.1016/j.ctrv.2013.01.008

Figure 2.

Figure 2

Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) flow diagram literature selection process.