20661
To the patients in the second group ( 30 patients ) , percussion - vibration was performed in the 0 degrees supine position , while slightly laterally lying and endotracheal aspiration was performed in the supine position .
 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