title: From the guest editor: Proton therapy: current evidence, challenges, and future plans.
authors.affiliation: From the Department of Radiation Oncology, The University of Michigan, Ann Arbor, MI.
authors.forename: Daniel A
authors.initials: DA
authors.lastname: Hamstra
mesh_terms: D001932:Brain Neoplasms / Q000532:radiotherapy; D002648:Child; D005770:Gastrointestinal Neoplasms / Q000532:radiotherapy; D006258:Head and Neck Neoplasms / Q000532:radiotherapy; D006801:Humans; D008175:Lung Neoplasms / Q000532:radiotherapy; D008223:Lymphoma / Q000532:radiotherapy; D008297:Male; D009369:Neoplasms / Q000532:radiotherapy*; D011471:Prostatic Neoplasms / Q000532:radiotherapy; D061766:Proton Therapy / Q000706:statistics & numerical data / Q000639:trends