Aging and inequalities: social protection policies for older adults resulting from the Covid-19 pandemic in Brazil - Kalache, Alexandre; Silva, Alexandre da; Giacomin, Karla Cristina; Lima Kenio Costa de; Ramos, Luiz Roberto; Louvison, Marilia Cristina Prado; Veras, Renato (Revista Brasileira de Geriatria e Gerontologia, 2020)