id	keyword
american_scientific_journal-2008	miscarriage
american_scientific_journal-2008	vol
american_scientific_journal-2008	igg
american_scientific_journal-2008	elisa
american_scientific_journal-2008	infection
american_scientific_journal-2008	pcr
american_scientific_journal-2008	trachomatis
american_scientific_journal-2008	pregnancy
american_scientific_journal-2008	igm