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When SASP was changed to 5-aminosalicylic acid (5-ASA), his skin eruptions were resolved, however, he developed weakness and atrophy in his right arm as well as progressive worsening of the dysesthesia in his legs and gait disturbance.
 adverse event: developed 
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: adverse event, potential therapeutic event 
Text: {0} 
Answer:
 adverse event: developed 