Accepted for Publication: October 22, 2014.
Published Online: May 27, 2015. doi:10.1001/jamasurg.2014.3502.
Study conception and design: Stoffels, Klode.
Acquisition, analysis, or interpretation of data: Stoffels, Pöppel, Schadendorf, Klode.
Drafting of the manuscript: Stoffels, Dissemond, Pöppel, Klode.
Critical revision of the manuscript for important intellectual content: Stoffels, Schadendorf, Klode.
Statistical analysis: Stoffels, Klode.
Administrative, technical, or material support: Stoffels, Pöppel, Klode.
Study supervision: Stoffels, Schadendorf, Klode.
Conflict of Interest Disclosures: Dr Schadendorf reported receiving consultancy fees, holding board membership, and obtaining lecture honoraria from GlaxoSmithKline, Novartis, Amgen, Bristol-Myers Squibb, Roche, Genentech, and MSD. No other disclosures were reported.