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An 18-year-old Japanese man weighing 53 kg with an anaplastic large cell lymphoma received continuous IV administration of TAC as post-transplantation prophylaxis against graft-versus-host disease (GVHD) after an allogeneic bone marrow transplantation (BMT).
 potential therapeutic event: prophylaxis 
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:
 potential therapeutic event: prophylaxis 