14107
Sodium phenylbutyrate was added to treatment with HU in two patients , but failed to produce an increase in total Hb despite increasing Hb F levels .
 increasing Hb F, HU; increasing Hb F, Sodium phenylbutyrate
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:
 increasing Hb F, HU; increasing Hb F, Sodium phenylbutyrate