AUTHOR=Niu Jie , Yang Qianqian , Wang Xiaoyun , Song Rong 

TITLE=Corrigendum: Sliding Mode Tracking Control of a Wire-Driven Upper-Limb Rehabilitation Robot with Nonlinear Disturbance Observer

JOURNAL=Frontiers in Neurology

VOLUME=9

YEAR=2018

URL=https://www.frontiersin.org/journals/neurology/articles/10.3389/fneur.2018.00511

DOI=10.3389/fneur.2018.00511

ISSN=1664-2295