| http://www.w3.org/ns/prov#value | - A head and neck support according to claim 16, including a second semi-rigid preformed U-shaped shell fabricated of a resilient material contoured and sized to nest within said first shell to fit the occipital bone, lower parietal bone and a major part of the temporal bone including the zygoma vertically and posterolaterally and neck posterolaterally at least to the base of the neck.
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