id	keyword
bjos-8670634	periodontitis
bjos-8670634	patients
bjos-8670634	arthritis
bjos-8670634	rheumatoid
bjos-8670634	oral
bjos-8670634	controls
bjos-8670634	study
bjos-8670634	disease
bjos-8670634	presence
bjos-8670634	sample
bjos-8670634	sci