4961
Although the data indicate an immune - complex cause for gold - salt nephropathy , the incident antigen ( or antigens ) and mechanism of action remain unidentified .
 nephropathy, gold - salt
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 nephropathy, gold - salt