Effectiveness of mass testing for control of COVID-19: a systematic review protocol - Lopes-Júnior, Luís Carlos; Bomfim, Emiliana; Silveira, Denise Sayuri Calheiros da; Pessanha, Raphael Manhães; Schuab, Sara Isabel Pimentel Carvalho; Lima, Regina Aparecida Garcia de (BMJ Open, 2020)