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;

Knowledge and attitude of deaf women in relation to contraceptive methods: A systematic review Gabriela Fuster Barbosa; Edson Santos Ferreira-Filho; Lais Abdo Quintão; Laura Fernandes Berto; Patrícia Gonçalves de Almeida; Edmund Chada Baracat; Luis Bahamondes; José Maria Soares-Junior; Isabel Cristina Esposito Sorpreso;

Benefits of melatonin on mortality in severe-to-critical COVID-19 patients: A systematic review and meta-analysis of randomized controlled trials Jinlv Qin; Guizuo Wang; Dong Han;