Santos, A. M. C., Kotsanis, A., Cunningham, L., & Penfold, S. N. (2021). Estimating the second primary cancer risk due to proton therapy compared to hybrid IMRT for left sided breast cancer. Acta Oncologica, 60(3), 300–304. https://doi.org/10.1080/0284186X.2020.1862421