12485
PATIENTS AND METHODS : This study is a retrospective cohort study of all children with cancer admitted to a single institution with fever and neutropenia ( defined as an absolute neutrophil count < 500 cells / mm3 ) in a 1 - year period .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None