OC-0645 Head and neck radiotherapy on the MR-Linac: a multicentre planning challenge on MRIdianplatform. (August 2021) - Chamberlain, M.; Krayenbühl, J.; van Timmeren, J.E.; Wilke, L.; Andratschke, N.; Tanadini-Lang, S.; Garcia Schüler, H.; Guckenberger, M.; Balermpas, P.