1884
The mutations associated with Pendred syndrome have complete loss of pendrin - induced chloride and iodide transport , while alleles unique to people with DFNB4 are able to transport both iodide and chloride , albeit at a much lower level than wild - type pendrin .
 Pendred syndrome, DFNB4
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 Pendred syndrome, DFNB4