| http://www.w3.org/ns/prov#value | - The apparatus of claim 1 further comprising:body retaining means for securing a patient to the board; and a foot support for supporting the feet of a patient and extending from the board, characterized in that the foot support is mounted on carriage means adapted for engaging track means extending longitudinally of the board, the carriage means including locking means for locking the carriage mean
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