12175
Identification of the V617F mutation of the JAK2 gene ( JAK2 V617F ) led to an important breakthrough in the understanding of MPN disease pathogenesis .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
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