International Guidelines on Radiation Therapy for Breast Cancer During the COVID-19 Pandemic. Issue 5 (May 2020) - Coles, C.E.; Aristei, C.; Bliss, J.; Boersma, L.; Brunt, A.M.; Chatterjee, S.; Hanna, G.; Jagsi, R.; Kaidar Person, O.; Kirby, A.; Mjaaland, I.; Meattini, I.; et al.