Dose-escalation of locally advanced non-small cell lung cancer with proton beam therapy

We appreciate the thoughtful comments by Drs. Hegde and Walker regarding the phase II study of concurrent chemotherapy and dose-escalated proton beam therapy (PBT) for locally advanced unresected non-small cell lung cancer (NSCLC) (1). There are several discussion points that we would like to add in tandem with the aforementioned correspondence.