4824
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 .
 adverse effect: increasing Hb F, HU; adverse effect: increasing Hb F, Sodium phenylbutyrate
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 adverse effect: increasing Hb F, HU; adverse effect: increasing Hb F, Sodium phenylbutyrate