Investigating a new tablet-based telerehabilitation app in patients with aphasia: a randomised, controlled, evaluator-blinded, multicentre trial protocol oleh Prabitha Urwyler, Arif Sinan Uslu, Stephan M Gerber, Nadine Schmidt, Carina Röthlisberger, Patric Wyss, Tim Vanbellingen, Sandra Schaller, Corina Wyss, Monica Koenig-Bruhin, Thomas Berger, Thomas Nyffeler, René Müri, Tobias Nef