51
A study of in vitro reactivity to L-T4, as assessed by peripheral blood lymphocyte transformation, was carried out in a patient with Hashimoto's disease who developed leukopenia during treatment with L-T4.
 adverse event: developed 
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: developed 