2491
The aim of this study was to investigate the effects of nebulized ipratropium in patients with acute asthma in order to determine whether it augments the bronchodilator effect of a beta agonist drug .
 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