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In this report, a patient who had undergone a renal transplantation as a result of malignant hypertension, and who was on immunosuppressive therapy consisting of cyclosporin, prednisone and azathioprine, developed thrombosis of the central retinal vein 5 years following the transplantation.
 ( adverse event: developed ,  a patient: Subject, malignant hypertension: Subject.Disorder, thrombosis of the central retinal vein: Effect, on immunosuppressive therapy consisting of cyclosporin, prednisone and azathioprine: Treatment, undergone a renal transplantation as a result of malignant hypertension: Treatment, cyclosporin: Treatment.Drug, prednisone: Treatment.Drug, azathioprine: Treatment.Drug, 5 years: Treatment.Time_elapsed, cyclosporin: Combination.Drug, prednisone: Combination.Drug, azathioprine: Combination.Drug) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: adverse event,potential therapeutic event, Arguments type: Treatment.Disorder,Treatment.Time_elapsed,Treatment.Dosage,Subject.Race,Treatment.Drug,Treatment.Route,Subject.Disorder,Treatment.Freq,Treatment,Effect,Subject.Population,Treatment.Duration,Combination.Drug,Subject,Subject.Age,Subject.Gender. 
Text: {0} 
Answer:
 ( adverse event: developed ,  a patient: Subject, malignant hypertension: Subject.Disorder, thrombosis of the central retinal vein: Effect, on immunosuppressive therapy consisting of cyclosporin, prednisone and azathioprine: Treatment, undergone a renal transplantation as a result of malignant hypertension: Treatment, cyclosporin: Treatment.Drug, prednisone: Treatment.Drug, azathioprine: Treatment.Drug, 5 years: Treatment.Time_elapsed, cyclosporin: Combination.Drug, prednisone: Combination.Drug, azathioprine: Combination.Drug) 