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Similarly , maternal serum somatomedin A was significantly reduced in rats nursing large litters .
 GENE: maternal serum somatomedin A
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: maternal serum somatomedin A 
Answer:
 GENE: maternal serum somatomedin A