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A 67-year-old patient, with primary polymyositis and without previous evidence of liver disease, developed clinical and biochemical features of severe cholestasis 3 months after initiation of azathioprine therapy.
 A 67-year-old patient, with primary polymyositis and without previous evidence of liver disease: Subject; 67-year-old: Subject.Age; cholestasis: Effect; 3 months after initiation of azathioprine: Treatment; azathioprine: Treatment.Drug; 3 months: Treatment.Time_elapsed; primary polymyositis: Treatment.Disorder
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:
 A 67-year-old patient, with primary polymyositis and without previous evidence of liver disease: Subject; 67-year-old: Subject.Age; cholestasis: Effect; 3 months after initiation of azathioprine: Treatment; azathioprine: Treatment.Drug; 3 months: Treatment.Time_elapsed; primary polymyositis: Treatment.Disorder