3815
Evidence from ground - based animal studies using tail - suspended hindlimb unloaded rats model has clearly demonstrated that simulated microgravity - induced smooth muscle cell phenotype conversion , a characteristic vascular structural and functional remodeling , may be one of the key contributors to postspaceflight orthostatic intolerance .
 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