Sources: 

https://www.shepherd.org/patient-programs/spinal-cord-injury/levels-and-types

https://www.mayoclinic.org/diseases-conditions/spinal-cord-injury/symptoms-causes/syc-

20377890https://www.businesswire.com/news/home/20221004005827/en/ONWARD-Announces-Topline-Results-from-the-LIFT-Home-Study-Supporting-Safety-and-Feasibility-of-ARC-EX-Therapy-to-Treat-People-with-Spinal-Cord-Injury-at-Home

https://clinicaltrials.gov/ct2/show/NCT02936453

https://www.nature.com/articles/s41591-021-01663-5