A machine learning COVID-19 mass screening based on symptoms and a simple olfactory test oleh Youcef Azeli, Alberto Fernández, Federico Capriles, Wojciech Rojewski, Vanesa Lopez-Madrid, David Sabaté-Lissner, Rosa Maria Serrano, Cristina Rey-Reñones, Marta Civit, Josefina Casellas, Abdelghani El Ouahabi-El Ouahabi, Maria Foglia-Fernández, Salvador Sarrá, Eduard Llobet