18682
In this study , PASMC were subjected to cyclic stretch of 20 % amplitude and frequency of 1 Hz for 24 h and compared to control cells maintained under static conditions .
 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