Efficacy and safety of left atrial appendage closure procedure in patients with non-valvular atrial fibrillation with contraindication and/or failure for oral anticoagulants: A systematic review and meta-analysis Ricardo dos Santos Simões; Aline Frossard Ribeiro Bortoluzzi; Janaina Cardoso Nunes Marinho; Julia Simões Corrêa Galendi; Wanderley Marques Bernardo;

Seroprevalence of SARS-CoV-2 in Brazil: A systematic review and meta-analysis Gerusa Maria Figueiredo; Fátima Mitiko Tengan; Sergio Roberto Campos; Expedito José Luna;

Prevalence of chronic pain in Brazil: A systematic review and meta-analysis Bruno Vitor Martins Santiago; Ana Beatriz Garcez de Oliveira; Gabriel Machado Romão da Silva; Maxuel de Freitas da Silva; Pedro Ernandes Bergamo; Maud Parise; Nivaldo Ribeiro Villela;