id	keyword
bjos-8665946	color
bjos-8665946	methods
bjos-8665946	values
bjos-8665946	photo
bjos-8665946	gingival
bjos-8665946	spectro
bjos-8665946	-30
bjos-8665946	study
bjos-8665946	agreement
bjos-8665946	delta
bjos-8665946	doi
bjos-8665946	comparison