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Only after three subsequent episodes of severe, symptomatic thrombocytopenia over the next four weeks did he say, upon repeat questioning, that he had continued to take quinine for night leg cramps.
 he: Subject; night leg cramps: Subject; he: Subject.Gender; symptomatic thrombocytopenia: Effect; continued to take quinine: Treatment; quinine: Treatment.Drug; night leg cramps: Treatment.Disorder; over the next four weeks: Treatment.Time_elapsed
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:
 he: Subject; night leg cramps: Subject; he: Subject.Gender; symptomatic thrombocytopenia: Effect; continued to take quinine: Treatment; quinine: Treatment.Drug; night leg cramps: Treatment.Disorder; over the next four weeks: Treatment.Time_elapsed