Survival Analysis of COPD Patients in a 13-Year Nationwide Cohort Study of the Brazilian National Health System. - Ludmila Peres Gargano; Isabella de Figueiredo Zuppo; Mariana Martins Gonzaga do Nascimento; Valéria Maria Augusto; Brian Godman; Juliana de Oliveira Costa; Francisco Assis Acúrcio; Juliana Álvares-Teodoro; Augusto Afonso Guerra (Frontiers Big Data, 2021)