Transcutaneous Cervical Spinal Cord Stimulation Combined with Robotic Exoskeleton Rehabilitation for the Upper Limbs in Subjects with Cervical SCI : Clinical Trial - García-Alén, Loreto (Institut Germans Trias i Pujol. Institut Guttmann) ; Kumru, Hatice (Institut Germans Trias i Pujol. Institut Guttmann) ; Castillo-Escario, Yolanda (Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina) ; Benito-Penalva, Jesús (Institut Germans Trias i Pujol. Institut Guttmann) ; Medina-Casanovas, Josep (Institut Germans Trias i Pujol. Institut Guttmann) ; Gerasimenko, Yury P. (University of Louisville) ; Edgerton, Victor (Rancho Research Institute) ; García Alias, Guillermo (Institut Germans Trias i Pujol. Institut Guttmann) ; Vidal, Joan (Institut Germans Trias i Pujol. Institut Guttmann) ; Universitat Autònoma de Barcelona