| http://www.w3.org/ns/prov#value | - Such an electromagnet may be powered by a D.C. power supply or by a battery pack. [0166] As shown in FIG. 29, the collar 158 may extend upward and sweep back behind the jaw 167, to prevent rotation of the collar 158 during sleep. [0167] V. Overviews of Other Systems [0168] A. Hyoid Bone Attachment [0169]FIG. 30 shows another system for treating sleep-related breathing disorders such as snoring, up
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