2086
METHODS : The former group included patients who had been treated with at least four PGE1 alpha - ciclodestrina , short - term treatment cycles per year while the latter was a historical reference group managed without prostaglandins .
 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