1738
Proliferation of abnormal bone marrow histiocytes, an undesired effect of granulocyte macrophage-colony-stimulating factor therapy in a patient with Hurler's syndrome undergoing bone marrow transplantation.
 adverse event: undesired effect 
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: undesired effect 