The editors wish to add the following information regarding the ethical conduct of the authors' research, which was inadvertently excluded from the above-referenced article by Samuel Swisher-McClure, BoonKeng Kevin Teo, Maura Kirk, Chang Chang, and Alexander Lin, Comparison of Pencil Beam Scanning Proton- and Photon-Based Techniques for Carcinoma of the Parotid.
Approval for human subjects research was obtained by an institutional review board (IRB) or equivalent ethics committee and conducted in compliance with IJPT ethical practices.