HNC	Head and Neck Cancer
HCTM	Hospital Canselor Tuanku Mukhriz
RT	Radiation Therapy
RIT	Radiation-Induced Trismus
MMO	Maximal Mouth Opening
MID	Maximal Interincisal Distance
Therabite	TheraBite Jaw Motion Rehabilitation System
DTS	Dynasplint Trismus System
MFIQ	Mandibular Function Impairment Questionnaire
SPSS	Statistical Package for the Social Sciences
RCT	Randomised Controlled Trial
RIF	Radiation-Induced Fibrosis
IQR	Interquartile Range
SD	Standard Deviation
IMRT	Intensity-Modulated Radiotherapy
TNM	Tumour–Node–Metastasis
NPC	Nasopharyngeal Carcinoma
3DCRT	Three-Dimensional Conformal Radiotherapy
ARD	Absolute Risk Difference
ISRCTN	International Standard Randomised Controlled Trial Number