2917
Scatter diagrams of the g ratio ( quotient fibre diameter / axon diameter ) define regenerating fibres as a distinct population , distinguishable from the surviving fibres by reduced sheath thickness and reduced axon calibre .
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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:
 None