. Author manuscript; available in PMC: 2017 May 8.
Published in final edited form as: IEEE Trans Neural Syst Rehabil Eng. 2014 Nov 13;23(2):149–158. doi: 10.1109/TNSRE.2014.2370510
Personal use is permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information.