[1] Khon Kaen Univ, Srinagarind Hosp, Fac Med, Skull Base Surg Unit,Dept Otorhinolaryngol, Khon Kaen 40002, Thailand
[2] Mukdahan Hosp, Dept Otorhinolaryngol, Mukdahan, Thailand
[3] Khon Kaen Head & Neck Oncol Res, Khon Kaen, Thailand
[4] Srinagarind Minimally Invas Surg Ctr Excellence, Khon Kaen, Thailand