Prospective evaluation of the outcome of velopharyngeal insufficiency therapy after pharyngeal flap, a sphincter pharyngoplasty, a double Z-plasty and simultaneous Orticochea and Furlow operations

Prospective evaluation of the outcome of velopharyngeal insufficiency therapy after pharyngeal flap, a sphincter pharyngoplasty, a double Z-plasty and simultaneous Orticochea and Furlow operations