id	keyword
gra-1428	isolates
gra-1428	children
gra-1428	study
gra-1428	bacterial
gra-1428	patients
gra-1428	media
gra-1428	otitis
gra-1428	ear
gra-1428	aureus
gra-1428	staphylococcus
gra-1428	penicillin