Article History
Received: 4 April 2019
Accepted: 8 August 2019
First Online: 19 August 2019
Competing Interests
: L.C.H. and L.D.S. report no competing interests. C.L. is a member of the following scientific advisory boards: Stalicla S.A., Phénix Foundation, and the International Research in Paraplegia (IRP) Foundation, Geneva.