%0 Journal Article %T A single-subject study of robotic upper limb training in the subacute phase for four persons with cervical spinal cord injury %J - %D 2019 %R https://doi.org/10.1038/s41394-019-0170-3 %X Single-subject design, standard training (¡°B¡±) compared with Robotic training (¡°C¡±) %U https://www.nature.com/articles/s41394-019-0170-3