13939
BACKGROUND : Hydroxyurea is a cytostatic agent used to treat myeloproliferative disorders and long - term treatment is associated with mucocutaneous adverse events and nail hyperpigmentation .
 adverse effect: mucocutaneous adverse events, Hydroxyurea; adverse effect: nail hyperpigmentation, Hydroxyurea
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: mucocutaneous adverse events, Hydroxyurea; adverse effect: nail hyperpigmentation, Hydroxyurea