25882
The current study suggests possible roles of alpha - synuclein aggregate and DAT distribution in the cytoplasm and synaptosome triggered by environmental toxins in later life in the development of neurodegenerative disorders .
 None
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:
 None