Additives for reducing the toxicity of respirable crystalline silica. SILIFE project Eliseo Monfort, Ana López-Lilao, Alberto Escrig, Maria Jesus Ibáñez, Guliana Bonvicini, Otto Creutzenberg and Christina Ziemann E3S Web Conf., 19 (2017) 02030 Published online: 23 October 2017 DOI: 10.1051/e3sconf/20171902030