Report of workshop on euthanasia for zebrafish - a matter of welfare and science - Köhler, A.; Collymore, C.; Finger-Baier, K.; Geisler, R.; Kaufmann, L.; Pounder, K.C.; Schulte-Merker, S.; Valentim, A.; Varga, Z.M.; Weiss, J.; Strähle, U. (Zebrafish, 2017)