14922
Prolonged responses were achieved with low doses of HU ( 3 - 10 mg / kg / day ) and higher doses were associated with mild reversible hematologic or hepatic toxicity and no further increases in Hb .
 hepatic toxicity, HU; mild reversible hematologic, HU
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:
 hepatic toxicity, HU; mild reversible hematologic, HU