PubMed:23022850 / 0-548 JSON TXT

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Id	Subject	Object	Predicate	Lexical cue
T1	80-389	BACKGROUND	denotes	Benzene, toluene, ethylbenzene and xylene (BTEX) are the most important toxic volatile compounds in the air and could be easily absorbed through the respiratory tract. In recent years, the risk of exposure to BTEX compounds, especially benzene as a carcinogen, has been considered in petroleum depot stations.
T2	401-490	OBJECTIVE	denotes	To assess the occupational exposure of petroleum depot workers in Iran to BTEX compounds.

Id	Subject	Object	Predicate	Lexical cue
SS1_23022850_2_0	80-121	expanded	denotes	Benzene, toluene, ethylbenzene and xylene
SS2_23022850_2_0	123-127	abbr	denotes	BTEX
AE1_23022850_2_0	SS1_23022850_2_0	SS2_23022850_2_0	abbreviatedTo	"Benzene, toluene, ethylbenzene and xylene",BTEX