9795
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 effect: cardiac effects, halofantrine; adverse effect: sudden death, halofantrine
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
 Entity Pairs:  cardiac effects, halofantrine; sudden death, halofantrine 
Answer:
 adverse effect: cardiac effects, halofantrine; adverse effect: sudden death, halofantrine