Robotic stretcher for spinal muscular atrophy patient: Preliminary tests of user controllability - Taisuke Sakaki; Kanta Aoki; Kuniharu Ushijima; Mihoko Sakuragi (10th International Conference on Ubiquitous Robots and Ambient Intelligence, URAI 2013, Jeju, Korea (South), October 30 - Nov. 2, 2013, 2013)