Ryan et al. (1999) Man­di­bu­lar advance­ment oral appli­ance the­ra­py for obs­truc­ti­ve sleep apnea: effect on awa­ke calib­re of velopharynx.

Tho­rax, 54 (11), 972–977, Dep of Med, Univ Brit Colum­bia, Van­cou­ver, Canada