Effect of a four-week virtual reality-based training versus conventional therapy on upper limb motor function after stroke: A multicenter parallel group randomized trial. oleh Corina Schuster-Amft, Kynan Eng, Zorica Suica, Irene Thaler, Sandra Signer, Isabelle Lehmann, Ludwig Schmid, Michael A McCaskey, Miura Hawkins, Martin L Verra, Daniel Kiper