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• Differences in study methodology > differences in outcome
Propensity Score Matched Analyses,
systematic reviews
Shirvani IJROBP 2012
Verstegen Ann Oncol 2013
Grills JCO 2010
Puri JTCS 2012
M Guckenberger - SBRT stage I NSCLC - HICARE 2015
53
Varlotto Cacner 2013
Solda Rediother Oncol 2013