Gemperli, A
,
Ronca, E
Scheel-Sailer, A
Koch, H G
Brach, M
Trezzini, B
Article History
Received: 4 January 2017
Revised: 22 March 2017
Accepted: 23 March 2017
First Online: 2 May 2017
Competing interests
: All authors were salaried by organizations financially compensated by the Swiss Paraplegic Foundation.