Filtration efficiency of a large set of COVID-19 face masks commonly used in Brazil - Morais, Fernando Gonçalves; Sakano, Victor Keniti; Lima, Lucas de; Franco, Marco Aurélio de Menezes; Reis, Daniel da Costa; Zanchetta, Liz de Mello; Jorge, Fabio de Oliveira; Landulfo, Eduardo; Catalani, Luiz Henrique; Barbosa, Henrique de Melo Jorge; John, Vanderley Moacyr; Artaxo Netto, Paulo Eduardo (Aerosol Science and Technology, 2021)