2073
In this study , we have demonstrated that a single intraperitoneal graft of microencapsulated pig Sertoli cells , producing pig insulin - like growth factor - 1 , successfully promoted significant proportional growth in the Laron mouse , a unique animal model of the human Laron Syndrome .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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