Smartphone screen testing, a novel pre-diagnostic method to identify SARS-CoV-2 infectious individuals oleh Rodrigo M Young, Camila J Solis, Andres Barriga-Fehrman, Carlos Abogabir, Alvaro R Thadani, Mariana Labarca, Eva Bustamante, Cecilia V Tapia, Antonia G Sarda, Francisca Sepulveda, Nadia Pozas, Leslie C Cerpa, María A Lavanderos, Nelson M Varela, Alvaro Santibañez, Ana M Sandino, Felipe Reyes-Lopez, Garth Dixon, Luis A Quiñones