“…This meant that the biomechanical tissue properties were assumed to be the same, even though multiple tissues comprised the structure. Twenty-one of the included studies assessed tissues as composites 31,37,46,49,51,63,71,72,95,102,103,109,122,136,144,146,155,158,163,170,185 . Of the composites assessed, 6 focused on soft tissue composites (eg, skin and underlying structures), 31,37,102,103,158,185 9 on structures associated with the spine, 46,49,95,109,122,136,146,155,170 5 on joints, 46,63,72,144,163 and 1 on vocal cords 71 …”