1697
METHODS : This study was undertaken as part of neonatal screening for hearing impairment and involved both ears of 200 newborns .
 Disease: hearing impairment
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: hearing impairment 
Answer:
 Disease: hearing impairment