“…Most studies were conducted either in Level I [ 8 , 37 , 42 , 46 , 57 , 61 , 63 , 66 ] or in unspecified trauma/SCI treatment centers [ 12 , 31 , 35 , 36 , 38 , 39 , 41 , 43 , 47 , 48 , 50 – 52 , 55 , 59 , 62 , 65 ]. Twenty-five studies were run in ICUs [ 12 , 30 – 33 , 35 – 44 , 46 , 57 , 59 – 62 , 64 – 66 ], 14 in rehabilitative settings [ 34 , 45 , 47 – 56 , 58 , 61 ] (Additional file 1 : Table S1). In 8 studies the cause of the injury was not specified [ 33 , 43 , 47 , 49 , 51 , 53 , 54 , 58 ], all the remaining studies enrolled traumatic SCI patients, 2 of them [ 55 , 61 ] enrolled both traumatic and a few non-traumatic patients, whose outcomes were not separable.…”