Perspectives on geriatric oncology research presented at the 2019 San Antonio Breast Cancer Symposium. Issue 4 (May 2020) - Battisti, Nicolò Matteo Luca; Lok, Wendy Chan Wing; Subbiah, Ishwaria; Okonji, David; Desideri, Isacco; Soto-Perez-De-Celis, Enrique