Predicting survival from colorectal cancer histology slides using deep learning: a retrospective multicenter study - Kather, Jakob Nikolas; Krisam, Johannes; Charoentong, Pornpimol; Herpel, Esther; Weis, Cleo-Aron Thias; Gaiser, Timo; Marx, Alexander; Valous, Nektarios A.; Ferber, Dyke; Zörnig, Inka; Jäger, Dirk; Brenner, Hermann; et al. (PLoS medicine, 2019)