Radiation-Induced Toxicity Risks in Photon Versus Proton Therapy for Synchronous Bilateral Breast Cancer oleh Line Bjerregaard Stick, PhD, Maria Fuglsang Jensen, PhD, Søren M. Bentzen, PhD, DMSc, Claus Kamby, MD, PhD, Anni Young Lundgaard, MD, Maja Vestmø Maraldo, MD, PhD, Birgitte Vrou Offersen, MD, PhD, Jen Yu, PhD, Ivan Richter Vogelius, PhD, DMSc