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OBJECTIVES : The present study was designed to answer these questions , using a rodent model of early childhood Pb exposure and treatment with succimer , a widely used chelating agent for the treatment of Pb poisoning .
 Chemical: Pb; Chemical: succimer; Disease: Pb poisoning
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: Pb; Chemical: succimer; Disease: Pb poisoning