RecruitingRadiation therapyPatient-Generated Health Data Collection During Chemoradiotherapy for Lung CancerThis is an observational study involving the collection of patient-generated health data using an Apple Watch, a home pulse oximeter, and a smartphone during a course of proton beam radiotherapy for lung cancer. The study period over which this information is collected will range from the day of study enrollment until two weeks after radiotherapy completion. Subjects will complete a short satisfaction survey at the end of the study period. Other information that is collected as part of routine care for this patient population will be extracted from subjects' medical records during the study period and afterwards.