Abstract

References
1.
Dowson D.
Medical engineering ; Proc Inst Mech Eng [H] 1991 ; 205 : 1 –10 .
2.
Damiani C.
,
Palieri G.
Spine News 1995 ; 4 : 4 –6 .
3.
Brutti C.
,
Cappellini G.
,
Ferrari G.
,
Spadini E.
Riabilitazione 2001 .
