id	keyword
american_scientific_journal-5259	children
american_scientific_journal-5259	kidney
american_scientific_journal-5259	renal
american_scientific_journal-5259	stones
american_scientific_journal-5259	study
american_scientific_journal-5259	pain
american_scientific_journal-5259	flank
american_scientific_journal-5259	calculi
american_scientific_journal-5259	ache