1564
However, in 1993, a clinical study involving 400 patients on the Thai-Burmese border revealed cardiac effects of antimalarial treatment with halofantrine, including one sudden death after the treatment.
 adverse event: effects 
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: effects 