22511
Subjects and Methods : We analysed SH incidence in 269 patients diagnosed from 1990 to 2010 ( total follow - up 2212 . 9 patient - years ) .
 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