987
Oral dapsone has been available for over 60 years and has been used to treat severe acne vulgaris; however, the oral formulation is known to cause dose-dependent haematological reactions and is currently indicated only for diseases such as dermatitis herpetiformis and Hansen's disease.
 ( adverse event: cause ,  dose-dependent haematological reactions: Effect, Oral dapsone: Treatment, dapsone: Treatment.Drug, Oral: Treatment.Route, dermatitis herpetiformis: Treatment.Disorder, Hansen's disease: Treatment.Disorder) 
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: cause ,  dose-dependent haematological reactions: Effect, Oral dapsone: Treatment, dapsone: Treatment.Drug, Oral: Treatment.Route, dermatitis herpetiformis: Treatment.Disorder, Hansen's disease: Treatment.Disorder) 