id	keyword
american_scientific_journal-1703	liver
american_scientific_journal-1703	rats
american_scientific_journal-1703	cadmium
american_scientific_journal-1703	extract
american_scientific_journal-1703	haptoglobin
american_scientific_journal-1703	communis
american_scientific_journal-1703	pyrus
american_scientific_journal-1703	serum
american_scientific_journal-1703	sciences
american_scientific_journal-1703	journal
american_scientific_journal-1703	group
american_scientific_journal-1703	protein