2377
The HRQOL showed superior results of vertebroplasty compared with conservative care at early and late time points of 0 . 39 ( CI 0 . 16 , 0 . 62 ) and 0 . 33 ( CI 0 . 16 , 0 . 51 ) , respectively .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None