Mendes F, Moita R, Afreixo V, Rodrigues A, Carrapatoso M, Sousa N. Study of COVID-19 surveillance time using a Primary Health Care Grouping of Porto Region dataset. JSHD [Internet]. 22Jul.2021 [cited 28Apr.2024];3(1):93-4. Available from: https://proa.ua.pt/index.php/jshd/article/view/24922