2144
The relation between tacrolimus treatment and staining was suggested by the appearance of pigmentation during topical tacrolimus treatment and its clinical disappearance when treatment was stopped .
 pigmentation, tacrolimus; pigmentation, tacrolimus
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:
 pigmentation, tacrolimus; pigmentation, tacrolimus