id	keyword
bjos-8658223	oral
bjos-8658223	pmd
bjos-8658223	study
bjos-8658223	risk
bjos-8658223	betel
bjos-8658223	habits
bjos-8658223	tobacco
bjos-8658223	quid
bjos-8658223	value
bjos-8658223	alcohol
bjos-8658223	prevalence
bjos-8658223	factors
bjos-8658223	smoking