2048
The pharmaceutical company producing Halfan has reported 8 cardiac arrests, leading to 6 deaths, when a higher dose than recommended was used, there was recent or concomitant treatment with mefloquine, there was pre-existing prolongation of the QT interval or the patient had a thiamine deficiency.
 8 cardiac arrests: Effect; 6 deaths: Effect; Halfan: Treatment; when a higher dose than recommended was used: Treatment; Halfan: Treatment.Drug; mefloquine: Treatment.Drug; a higher dose than recommended: Treatment.Dosage
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: adverse event 
  Option: Treatment.Freq, Subject.Population, Combination.Drug, Subject.Gender, Treatment.Duration, Subject, Effect, Treatment, Treatment.Disorder, Subject.Disorder, Treatment.Route, Subject.Race, Treatment.Time_elapsed, Treatment.Dosage, Subject.Age, Treatment.Drug 
Text: {0} 
Answer:
 8 cardiac arrests: Effect; 6 deaths: Effect; Halfan: Treatment; when a higher dose than recommended was used: Treatment; Halfan: Treatment.Drug; mefloquine: Treatment.Drug; a higher dose than recommended: Treatment.Dosage