Difficulties in accessing health services among the elderly in the city of São Paulo-Brazil - Oliveira, Elaine Cristina Torres; Louvison, Marilia Cristina Prado; Teixeira, Doralice Severo da Cruz; Menezes, Tarciana Nobre; Rosa, Tereza Etsuko da Costa; Duarte, Yeda Aparecida de Oliveira (PLoS One, 2022)