AJCC	American Joint Committee on Cancer
ARDS	Adult Respiratory Distress Syndrome
ASA	American Society of Anesthesiologists
CAD	Coronal Arterial Disease
CCI	Charlson Comorbidity Index
CCRT	Concurrent Chemoradiotherapy
CI	Confidence Interval
CKD	Chronic Kidney Disease
COPD	Chronic Obstructive Pulmonary Disease
CVA	Cerebral Vascular Accident
DIC	Disseminated Intravascular Coagulation
ESRD	End-Stage Renal Disease
HBV	Hepatitis B
HCV	Hepatitis C
HNSCC	Head and Neck Squamous Cell Carcinoma
HR	Hazard Ratio
HTN	Diabetes Mellitus DM Hypertension
ICD-9-CM	International Classification of Diseases Ninth Revision Clinical Modification
LA-HNSCC	Locoregionally Advanced Head and Neck Squamous Cell Carcinoma
MI	Myocardial Infarction
PUD	Peptic Ulcer Disease
PVD	Peripheral Vascular Disease
RT	Radiotherapy
TCRD	Taiwan Cancer Registry Database
TIA	Transient Ischemic Attack