1805
Based on the Naranjo algorithm, the adverse reaction observed was probably related to the hydroxyurea treatment (score = 6); however, the hydroxyurea chemotherapy could not be discontinued because of the myeloproliferative disorder.
 adverse event: related 
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: adverse event, potential therapeutic event 
Text: {0} 
Answer:
 adverse event: related 