Collaborative study on the effect of grinding on the detection of bones from processed animal proteins in feed by light microscopy - Pascal Veys; Viviane Planchon; Ruairi Colbert; Clara Cruz; Geneviève Frick; Ioannis Ioannou; Daniela Marchis; Erik Nordkvist; Inge Paradies-Severin; Arja Pohto; Roland Weiss; Vincent Baeten; et al. (Food Additives & Contaminants: Part A, 2017)