A comparative study on the evaluation of velopharyngeal insufficiency with lateral cephalometric radiographs and nasopharynx fiberscope
PENG Zhao-wei, ZHONG Tian-hang, HAN Jian-li, KUANG Yi-yuan, MA Lian
China Journal of Oral and Maxillofacial Surgery . 2020, (3): 245 -249 .  DOI: 10.19438/j.cjoms.2020.03.011