Reusable snorkel masks adapted as particulate respirators. oleh Henry Seligman, Sameer Zaman, David S Pitcher, Matthew J Shun-Shin, Freya Hepworth Lloyd, Vitaliy Androschuk, Sayan Sen, Rasha Al-Lamee, David M Miller, Harry W Barnett, Gulam S Haji, Luke S Howard, Sukhjinder Nijjer, Jamil Mayet, Darrel P Francis, Oscar Ces, Nicholas W F Linton, Nicholas S Peters, Ricardo Petraco