How should health systems prepare for the evolving COVID-19 pandemic? Reflections from the perspective of a Tertiary Cancer Center - Chen, Andre Tsin Chih; Moniz, Camila Motta Venchiarutti; Ribeiro-Júnior, Ulysses; Diz, Maria Del Pilar Estevez; Salvajoli, João Victor; Vasconcelos, Karina Gondim Moutinho Da Conceição; Auler-Júnior, José Otávio Costa; Cecconello, Ivan; Abdala, Edson; Hoff, Paulo Marcelo Gehm (Clinics, 2020)