[1] CINVESTAV, Automat Control Dept, Mexico City, DF, Mexico
[2] CINVESTAV, Human Mot Anal Lab, Mexico City, DF, Mexico
[3] Natl Inst Rehabil, Mexico City, DF, Mexico
[4] Rhein Westfal TH Aachen, Rehabil & Prevent Engn Dept, Aachen, Germany
[5] Natl Inst Rehabil, Pediat Rehabil Dept, Mexico City, DF, Mexico
[6] Natl Inst Rehabil, Med Engn Dept, Mexico City, DF, Mexico