1. Department of Surgery, Faculty of Medicine, Prince of Songkla University, Songklanagarind Hospital, Hat Yai, Songkhla, Thailand.
2. Department of Otolaryngology Head and Neck Surgery, Faculty of Medicine, Prince of Songkla University, Songklanagarind Hospital, Hat Yai, Songkhla, Thailand.
3. Department of Radiology, Faculty of Medicine, Prince of Songkla University, Songklanagarind Hospital, Hat Yai, Songkhla, Thailand.
4. Department of Anesthesiology, Faculty of Medicine, Prince of Songkla University, Songklanagarind Hospital, Hat Yai, Songkhla, Thailand.